diff --git a/lib/fluent/compat/handle_tag_name_mixin.rb b/lib/fluent/compat/handle_tag_name_mixin.rb
new file mode 100644
index 0000000000..2a14b8d732
--- /dev/null
+++ b/lib/fluent/compat/handle_tag_name_mixin.rb
@@ -0,0 +1,53 @@
+#
+# Fluentd
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+require 'fluent/compat/record_filter_mixin'
+
+module Fluent
+  module Compat
+    module HandleTagNameMixin
+      include RecordFilterMixin
+
+      attr_accessor :remove_tag_prefix, :remove_tag_suffix, :add_tag_prefix, :add_tag_suffix
+      def configure(conf)
+        super
+
+        @remove_tag_prefix = if conf.has_key?('remove_tag_prefix')
+                               Regexp.new('^' + Regexp.escape(conf['remove_tag_prefix']))
+                             else
+                               nil
+                             end
+
+        @remove_tag_suffix = if conf.has_key?('remove_tag_suffix')
+                               Regexp.new(Regexp.escape(conf['remove_tag_suffix']) + '$')
+                             else
+                               nil
+                             end
+
+        @add_tag_prefix = conf['add_tag_prefix']
+        @add_tag_suffix = conf['add_tag_suffix']
+      end
+
+      def filter_record(tag, time, record)
+        tag.sub!(@remove_tag_prefix, '') if @remove_tag_prefix
+        tag.sub!(@remove_tag_suffix, '') if @remove_tag_suffix
+        tag.insert(0, @add_tag_prefix) if @add_tag_prefix
+        tag << @add_tag_suffix if @add_tag_suffix
+        super(tag, time, record)
+      end
+    end
+  end
+end
diff --git a/lib/fluent/compat/set_tag_key_mixin.rb b/lib/fluent/compat/set_tag_key_mixin.rb
new file mode 100644
index 0000000000..96389a6663
--- /dev/null
+++ b/lib/fluent/compat/set_tag_key_mixin.rb
@@ -0,0 +1,50 @@
+#
+# Fluentd
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+require 'fluent/config/error'
+require 'fluent/config/types'
+require 'fluent/compat/record_filter_mixin'
+
+module Fluent
+  module Compat
+    module SetTagKeyMixin
+      include RecordFilterMixin
+
+      attr_accessor :include_tag_key, :tag_key
+
+      def configure(conf)
+        @include_tag_key = false
+
+        super
+
+        if s = conf['include_tag_key']
+          include_tag_key = Fluent::Config.bool_value(s)
+          raise Fluent::ConfigError, "Invalid boolean expression '#{s}' for include_tag_key parameter" if include_tag_key.nil?
+
+          @include_tag_key = include_tag_key
+        end
+
+        @tag_key = conf['tag_key'] || 'tag' if @include_tag_key
+      end
+
+      def filter_record(tag, time, record)
+        super
+
+        record[@tag_key] = tag if @include_tag_key
+      end
+    end
+  end
+end
diff --git a/lib/fluent/compat/set_time_key_mixin.rb b/lib/fluent/compat/set_time_key_mixin.rb
new file mode 100644
index 0000000000..3df3830db9
--- /dev/null
+++ b/lib/fluent/compat/set_time_key_mixin.rb
@@ -0,0 +1,69 @@
+#
+# Fluentd
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+require 'fluent/config/error'
+require 'fluent/compat/record_filter_mixin'
+require 'fluent/compat/time_formatter'
+
+module Fluent
+  module Compat
+     module SetTimeKeyMixin
+       require 'fluent/timezone'
+       include RecordFilterMixin
+
+       attr_accessor :include_time_key, :time_key, :localtime, :timezone
+
+       def configure(conf)
+         @include_time_key = false
+         @localtime = false
+         @timezone = nil
+
+         super
+
+         if s = conf['include_time_key']
+           include_time_key = Fluent::Config.bool_value(s)
+           raise Fluent::ConfigError, "Invalid boolean expression '#{s}' for include_time_key parameter" if include_time_key.nil?
+
+           @include_time_key = include_time_key
+         end
+
+         if @include_time_key
+           @time_key     = conf['time_key'] || 'time'
+           @time_format  = conf['time_format']
+
+           if    conf['localtime']
+             @localtime = true
+           elsif conf['utc']
+             @localtime = false
+           end
+
+           if conf['timezone']
+             @timezone = conf['timezone']
+             Fluent::Timezone.validate!(@timezone)
+           end
+
+           @timef = Fluent::Compat::TimeFormatter.new(@time_format, @localtime, @timezone)
+         end
+       end
+
+       def filter_record(tag, time, record)
+         super
+
+         record[@time_key] = @timef.format(time) if @include_time_key
+       end
+     end
+   end
+ end
diff --git a/lib/fluent/compat/time_formatter.rb b/lib/fluent/compat/time_formatter.rb
new file mode 100644
index 0000000000..a788fd25b3
--- /dev/null
+++ b/lib/fluent/compat/time_formatter.rb
@@ -0,0 +1,114 @@
+#
+# Fluentd
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+require 'fluent/timezone'
+require 'fluent/time'
+
+module Fluent
+  module Compat
+    class TimeFormatter
+      def initialize(format, localtime, timezone = nil)
+        @tc1 = 0
+        @tc1_str = nil
+        @tc2 = 0
+        @tc2_str = nil
+
+        if format && format =~ /(^|[^%])(%%)*%L|(^|[^%])(%%)*%\d*N/
+          define_singleton_method(:format) {|time|
+            format_with_subsec(time)
+          }
+        else
+          define_singleton_method(:format) {|time|
+            format_without_subsec(time)
+          }
+        end
+
+        if formatter = Fluent::Timezone.formatter(timezone, format)
+          define_singleton_method(:format_nocache) {|time|
+            formatter.call(time)
+          }
+          return
+        end
+
+        if format
+          if localtime
+            define_singleton_method(:format_nocache) {|time|
+              Time.at(time).strftime(format)
+            }
+          else
+            define_singleton_method(:format_nocache) {|time|
+              Time.at(time).utc.strftime(format)
+            }
+          end
+        else
+          if localtime
+            define_singleton_method(:format_nocache) {|time|
+              Time.at(time).iso8601
+            }
+          else
+            define_singleton_method(:format_nocache) {|time|
+              Time.at(time).utc.iso8601
+            }
+          end
+        end
+      end
+
+      def format_without_subsec(time)
+        if @tc1 == time
+          return @tc1_str
+        elsif @tc2 == time
+          return @tc2_str
+        else
+          str = format_nocache(time)
+          if @tc1 < @tc2
+            @tc1 = time
+            @tc1_str = str
+          else
+            @tc2 = time
+            @tc2_str = str
+          end
+          return str
+        end
+      end
+
+      def format_with_subsec(time)
+        if Fluent::EventTime.eq?(@tc1, time)
+          return @tc1_str
+        elsif Fluent::EventTime.eq?(@tc2, time)
+          return @tc2_str
+        else
+          str = format_nocache(time)
+          if @tc1 < @tc2
+            @tc1 = time
+            @tc1_str = str
+          else
+            @tc2 = time
+            @tc2_str = str
+          end
+          return str
+        end
+      end
+
+      def format(time)
+        # will be overridden in initialize
+      end
+
+      def format_nocache(time)
+        # will be overridden in initialize
+      end
+    end
+  end
+end
diff --git a/lib/fluent/compat/type_converter.rb b/lib/fluent/compat/type_converter.rb
new file mode 100644
index 0000000000..d34d0d3687
--- /dev/null
+++ b/lib/fluent/compat/type_converter.rb
@@ -0,0 +1,90 @@
+#
+# Fluentd
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+module Fluent
+  module Compat
+    module TypeConverter
+      Converters = {
+        'string' => lambda { |v| v.to_s },
+        'integer' => lambda { |v| v.to_i },
+        'float' => lambda { |v| v.to_f },
+        'bool' => lambda { |v|
+          case v.downcase
+          when 'true', 'yes', '1'
+            true
+          else
+            false
+          end
+        },
+        'time' => lambda { |v, time_parser|
+          time_parser.parse(v)
+        },
+        'array' => lambda { |v, delimiter|
+          v.to_s.split(delimiter)
+        }
+      }
+
+      def self.included(klass)
+        klass.instance_eval {
+          config_param :types, :string, default: nil
+          config_param :types_delimiter, :string, default: ','
+          config_param :types_label_delimiter, :string, default: ':'
+        }
+      end
+
+      def configure(conf)
+        super
+
+        @type_converters = nil
+        @type_converters = parse_types_parameter unless @types.nil?
+      end
+
+      private
+
+      def convert_type(name, value)
+        converter = @type_converters[name]
+        converter.nil? ? value : converter.call(value)
+      end
+
+      def parse_types_parameter
+        converters = {}
+
+        @types.split(@types_delimiter).each { |pattern_name|
+          name, type, format = pattern_name.split(@types_label_delimiter, 3)
+          raise ConfigError, "Type is needed" if type.nil?
+
+          case type
+          when 'time'
+            require 'fluent/parser'
+            t_parser = Fluent::TextParser::TimeParser.new(format)
+            converters[name] = lambda { |v|
+              Converters[type].call(v, t_parser)
+            }
+          when 'array'
+            delimiter = format || ','
+            converters[name] = lambda { |v|
+              Converters[type].call(v, delimiter)
+            }
+          else
+            converters[name] = Converters[type]
+          end
+        }
+
+        converters
+      end
+    end
+  end
+end
diff --git a/lib/fluent/mixin.rb b/lib/fluent/mixin.rb
index e12274264c..0913ef0b27 100644
--- a/lib/fluent/mixin.rb
+++ b/lib/fluent/mixin.rb
@@ -14,279 +14,18 @@
 #    limitations under the License.
 #
 
-require 'fluent/timezone'
-require 'fluent/time'
-require 'fluent/config/error'
 require 'fluent/compat/record_filter_mixin'
+require 'fluent/compat/handle_tag_name_mixin'
+require 'fluent/compat/set_time_key_mixin'
+require 'fluent/compat/set_tag_key_mixin'
+require 'fluent/compat/time_formatter'
+require 'fluent/compat/type_converter'
 
 module Fluent
-  class TimeFormatter
-    def initialize(format, localtime, timezone = nil)
-      @tc1 = 0
-      @tc1_str = nil
-      @tc2 = 0
-      @tc2_str = nil
-
-      if format && format =~ /(^|[^%])(%%)*%L|(^|[^%])(%%)*%\d*N/
-        define_singleton_method(:format) {|time|
-          format_with_subsec(time)
-        }
-      else
-        define_singleton_method(:format) {|time|
-          format_without_subsec(time)
-        }
-      end
-
-      if formatter = Fluent::Timezone.formatter(timezone, format)
-        define_singleton_method(:format_nocache) {|time|
-          formatter.call(time)
-        }
-        return
-      end
-
-      if format
-        if localtime
-          define_singleton_method(:format_nocache) {|time|
-            Time.at(time).strftime(format)
-          }
-        else
-          define_singleton_method(:format_nocache) {|time|
-            Time.at(time).utc.strftime(format)
-          }
-        end
-      else
-        if localtime
-          define_singleton_method(:format_nocache) {|time|
-            Time.at(time).iso8601
-          }
-        else
-          define_singleton_method(:format_nocache) {|time|
-            Time.at(time).utc.iso8601
-          }
-        end
-      end
-    end
-
-    def format_without_subsec(time)
-      if @tc1 == time
-        return @tc1_str
-      elsif @tc2 == time
-        return @tc2_str
-      else
-        str = format_nocache(time)
-        if @tc1 < @tc2
-          @tc1 = time
-          @tc1_str = str
-        else
-          @tc2 = time
-          @tc2_str = str
-        end
-        return str
-      end
-    end
-
-    def format_with_subsec(time)
-      if Fluent::EventTime.eq?(@tc1, time)
-        return @tc1_str
-      elsif Fluent::EventTime.eq?(@tc2, time)
-        return @tc2_str
-      else
-        str = format_nocache(time)
-        if @tc1 < @tc2
-          @tc1 = time
-          @tc1_str = str
-        else
-          @tc2 = time
-          @tc2_str = str
-        end
-        return str
-      end
-    end
-
-    def format(time)
-      # will be overridden in initialize
-    end
-
-    def format_nocache(time)
-      # will be overridden in initialize
-    end
-  end
-
+  TimeFormatter = Fluent::Compat::TimeFormatter
   RecordFilterMixin = Fluent::Compat::RecordFilterMixin
-
-  module HandleTagNameMixin
-    include RecordFilterMixin
-
-    attr_accessor :remove_tag_prefix, :remove_tag_suffix, :add_tag_prefix, :add_tag_suffix
-    def configure(conf)
-      super
-
-      @remove_tag_prefix = if conf.has_key?('remove_tag_prefix')
-                             Regexp.new('^' + Regexp.escape(conf['remove_tag_prefix']))
-                           else
-                             nil
-                           end
-
-      @remove_tag_suffix = if conf.has_key?('remove_tag_suffix')
-                             Regexp.new(Regexp.escape(conf['remove_tag_suffix']) + '$')
-                           else
-                             nil
-                           end
-
-      @add_tag_prefix = conf['add_tag_prefix']
-      @add_tag_suffix = conf['add_tag_suffix']
-    end
-
-    def filter_record(tag, time, record)
-      tag.sub!(@remove_tag_prefix, '') if @remove_tag_prefix
-      tag.sub!(@remove_tag_suffix, '') if @remove_tag_suffix
-      tag.insert(0, @add_tag_prefix) if @add_tag_prefix
-      tag << @add_tag_suffix if @add_tag_suffix
-      super(tag, time, record)
-    end
-  end
-
-  module SetTimeKeyMixin
-    require 'fluent/timezone'
-    include RecordFilterMixin
-
-    attr_accessor :include_time_key, :time_key, :localtime, :timezone
-
-    def configure(conf)
-      @include_time_key = false
-      @localtime = false
-      @timezone = nil
-
-      super
-
-      if s = conf['include_time_key']
-        include_time_key = Config.bool_value(s)
-        raise ConfigError, "Invalid boolean expression '#{s}' for include_time_key parameter" if include_time_key.nil?
-
-        @include_time_key = include_time_key
-      end
-
-      if @include_time_key
-        @time_key     = conf['time_key'] || 'time'
-        @time_format  = conf['time_format']
-
-        if    conf['localtime']
-          @localtime = true
-        elsif conf['utc']
-          @localtime = false
-        end
-
-        if conf['timezone']
-          @timezone = conf['timezone']
-          Fluent::Timezone.validate!(@timezone)
-        end
-
-        @timef = TimeFormatter.new(@time_format, @localtime, @timezone)
-      end
-    end
-
-    def filter_record(tag, time, record)
-      super
-
-      record[@time_key] = @timef.format(time) if @include_time_key
-    end
-  end
-
-  module SetTagKeyMixin
-    include RecordFilterMixin
-
-    attr_accessor :include_tag_key, :tag_key
-
-    def configure(conf)
-      @include_tag_key = false
-
-      super
-
-      if s = conf['include_tag_key']
-        include_tag_key = Config.bool_value(s)
-        raise ConfigError, "Invalid boolean expression '#{s}' for include_tag_key parameter" if include_tag_key.nil?
-
-        @include_tag_key = include_tag_key
-      end
-
-      @tag_key = conf['tag_key'] || 'tag' if @include_tag_key
-    end
-
-    def filter_record(tag, time, record)
-      super
-
-      record[@tag_key] = tag if @include_tag_key
-    end
-  end
-
-  module TypeConverter
-    Converters = {
-      'string' => lambda { |v| v.to_s },
-      'integer' => lambda { |v| v.to_i },
-      'float' => lambda { |v| v.to_f },
-      'bool' => lambda { |v|
-        case v.downcase
-        when 'true', 'yes', '1'
-          true
-        else
-          false
-        end
-      },
-      'time' => lambda { |v, time_parser|
-        time_parser.parse(v)
-      },
-      'array' => lambda { |v, delimiter|
-        v.to_s.split(delimiter)
-      }
-    }
-
-    def self.included(klass)
-      klass.instance_eval {
-        config_param :types, :string, default: nil
-        config_param :types_delimiter, :string, default: ','
-        config_param :types_label_delimiter, :string, default: ':'
-      }
-    end
-
-    def configure(conf)
-      super
-
-      @type_converters = nil
-      @type_converters = parse_types_parameter unless @types.nil?
-    end
-
-    private
-
-    def convert_type(name, value)
-      converter = @type_converters[name]
-      converter.nil? ? value : converter.call(value)
-    end
-
-    def parse_types_parameter
-      converters = {}
-
-      @types.split(@types_delimiter).each { |pattern_name|
-        name, type, format = pattern_name.split(@types_label_delimiter, 3)
-        raise ConfigError, "Type is needed" if type.nil?
-
-        case type
-        when 'time'
-          require 'fluent/parser'
-          t_parser = Fluent::TextParser::TimeParser.new(format)
-          converters[name] = lambda { |v|
-            Converters[type].call(v, t_parser)
-          }
-        when 'array'
-          delimiter = format || ','
-          converters[name] = lambda { |v|
-            Converters[type].call(v, delimiter)
-          }
-        else
-          converters[name] = Converters[type]
-        end
-      }
-
-      converters
-    end
-  end
+  HandleTagNameMixin = Fluent::Compat::HandleTagNameMixin
+  SetTimeKeyMixin = Fluent::Compat::SetTimeKeyMixin
+  SetTagKeyMixin = Fluent::Compat::SetTagKeyMixin
+  TypeConverter = Fluent::Compat::TypeConverter
 end