diff --git a/kaminari-core/.gitignore b/kaminari-core/.gitignore
new file mode 100644
index 0000000..0cb6eeb
--- /dev/null
+++ b/kaminari-core/.gitignore
@@ -0,0 +1,9 @@
+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
diff --git a/kaminari-core/.rspec b/kaminari-core/.rspec
new file mode 100644
index 0000000..8c18f1a
--- /dev/null
+++ b/kaminari-core/.rspec
@@ -0,0 +1,2 @@
+--format documentation
+--color
diff --git a/kaminari-core/.travis.yml b/kaminari-core/.travis.yml
new file mode 100644
index 0000000..0ae240f
--- /dev/null
+++ b/kaminari-core/.travis.yml
@@ -0,0 +1,5 @@
+sudo: false
+language: ruby
+rvm:
+  - 2.3.1
+before_install: gem install bundler -v 1.13.1
diff --git a/kaminari-core/Gemfile b/kaminari-core/Gemfile
new file mode 100644
index 0000000..7d84e3c
--- /dev/null
+++ b/kaminari-core/Gemfile
@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in kaminari-core.gemspec
+gemspec
diff --git a/kaminari-core/LICENSE.txt b/kaminari-core/LICENSE.txt
new file mode 100644
index 0000000..a37a69c
--- /dev/null
+++ b/kaminari-core/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Akira Matsuda
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/kaminari-core/README.md b/kaminari-core/README.md
new file mode 100644
index 0000000..8242ed1
--- /dev/null
+++ b/kaminari-core/README.md
@@ -0,0 +1,41 @@
+# Kaminari::Core
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/kaminari/core`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'kaminari-core'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install kaminari-core
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/kaminari-core.
+
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+
diff --git a/kaminari-core/Rakefile b/kaminari-core/Rakefile
new file mode 100644
index 0000000..b7e9ed5
--- /dev/null
+++ b/kaminari-core/Rakefile
@@ -0,0 +1,6 @@
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec
diff --git a/kaminari-core/bin/console b/kaminari-core/bin/console
new file mode 100755
index 0000000..bbe926f
--- /dev/null
+++ b/kaminari-core/bin/console
@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "kaminari/core"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start
diff --git a/kaminari-core/bin/setup b/kaminari-core/bin/setup
new file mode 100755
index 0000000..dce67d8
--- /dev/null
+++ b/kaminari-core/bin/setup
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here
diff --git a/kaminari-core/kaminari-core.gemspec b/kaminari-core/kaminari-core.gemspec
new file mode 100644
index 0000000..af8dcbb
--- /dev/null
+++ b/kaminari-core/kaminari-core.gemspec
@@ -0,0 +1,36 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'kaminari/core/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "kaminari-core"
+  spec.version       = Kaminari::Core::VERSION
+  spec.authors       = ["Akira Matsuda"]
+  spec.email         = ["ronnie@dio.jp"]
+
+  spec.summary       = %q{TODO: Write a short summary, because Rubygems requires one.}
+  spec.description   = %q{TODO: Write a longer description or delete this line.}
+  spec.homepage      = "TODO: Put your gem's website or public repo URL here."
+  spec.license       = "MIT"
+
+  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
+  # to allow pushing to a single host or delete this section to allow pushing to any host.
+  if spec.respond_to?(:metadata)
+    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
+  else
+    raise "RubyGems 2.0 or newer is required to protect against " \
+      "public gem pushes."
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.13"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+end
diff --git a/kaminari-core/lib/kaminari/core.rb b/kaminari-core/lib/kaminari/core.rb
new file mode 100644
index 0000000..f5bc163
--- /dev/null
+++ b/kaminari-core/lib/kaminari/core.rb
@@ -0,0 +1,7 @@
+require "kaminari/core/version"
+
+module Kaminari
+  module Core
+    # Your code goes here...
+  end
+end
diff --git a/kaminari-core/lib/kaminari/core/version.rb b/kaminari-core/lib/kaminari/core/version.rb
new file mode 100644
index 0000000..c3bf600
--- /dev/null
+++ b/kaminari-core/lib/kaminari/core/version.rb
@@ -0,0 +1,5 @@
+module Kaminari
+  module Core
+    VERSION = "0.1.0"
+  end
+end
diff --git a/kaminari-core/spec/kaminari/core_spec.rb b/kaminari-core/spec/kaminari/core_spec.rb
new file mode 100644
index 0000000..6125549
--- /dev/null
+++ b/kaminari-core/spec/kaminari/core_spec.rb
@@ -0,0 +1,11 @@
+require "spec_helper"
+
+describe Kaminari::Core do
+  it "has a version number" do
+    expect(Kaminari::Core::VERSION).not_to be nil
+  end
+
+  it "does something useful" do
+    expect(false).to eq(true)
+  end
+end
diff --git a/kaminari-core/spec/spec_helper.rb b/kaminari-core/spec/spec_helper.rb
new file mode 100644
index 0000000..9fabff8
--- /dev/null
+++ b/kaminari-core/spec/spec_helper.rb
@@ -0,0 +1,2 @@
+$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
+require "kaminari/core"