diff --git a/Gemfile b/Gemfile
index ce08fc84d..9f5559b79 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,6 +38,8 @@ gem 'rack-user_agent'
 
 gem 'rack-attack'
 
+gem 'google_drive'
+
 group :development do
   gem 'web-console'
   gem 'spring'
diff --git a/Gemfile.lock b/Gemfile.lock
index 12d179882..982b4cdd0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,6 +73,8 @@ GEM
     connection_pool (2.2.1)
     crass (1.0.2)
     debug_inspector (0.0.3)
+    declarative (0.0.10)
+    declarative-option (0.1.0)
     diff-lcs (1.3)
     erubi (1.7.0)
     erubis (2.7.0)
@@ -95,6 +97,25 @@ GEM
       net-http-pipeline
     globalid (0.4.1)
       activesupport (>= 4.2.0)
+    google-api-client (0.13.6)
+      addressable (~> 2.5, >= 2.5.1)
+      googleauth (~> 0.5)
+      httpclient (>= 2.8.1, < 3.0)
+      mime-types (~> 3.0)
+      representable (~> 3.0)
+      retriable (>= 2.0, < 4.0)
+    google_drive (2.1.8)
+      google-api-client (>= 0.11.0, < 0.14.0)
+      googleauth (>= 0.5.0, < 1.0.0)
+      nokogiri (>= 1.5.3, < 2.0.0)
+    googleauth (0.5.1)
+      faraday (~> 0.9)
+      jwt (~> 1.4)
+      logging (~> 2.0)
+      memoist (~> 0.12)
+      multi_json (~> 1.11)
+      os (~> 0.9)
+      signet (~> 0.7)
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
@@ -110,6 +131,7 @@ GEM
       haml (>= 4.0, < 6)
       nokogiri (>= 1.6.0)
       ruby_parser (~> 3.5)
+    httpclient (2.8.3)
     hyp_diff (0.0.5)
       diff-lcs (~> 1.2, >= 1.2.5)
       nokogiri (~> 1.6, >= 1.6.5)
@@ -125,6 +147,7 @@ GEM
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
     json (2.1.0)
+    jwt (1.5.6)
     koala (3.0.0)
       addressable
       faraday
@@ -136,6 +159,10 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
+    little-plugger (1.1.4)
+    logging (2.2.2)
+      little-plugger (~> 1.1)
+      multi_json (~> 1.10)
     loofah (2.1.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -159,6 +186,7 @@ GEM
     nio4r (2.1.0)
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
+    os (0.9.6)
     pg (0.21.0)
     pry (0.11.2)
       coderay (~> 1.1.0)
@@ -219,6 +247,11 @@ GEM
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    representable (3.0.4)
+      declarative (< 0.1.0)
+      declarative-option (< 0.2.0)
+      uber (< 0.2.0)
+    retriable (3.1.1)
     rspec-core (3.7.0)
       rspec-support (~> 3.7.0)
     rspec-expectations (3.7.0)
@@ -291,6 +324,11 @@ GEM
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
     sexp_processor (4.10.0)
+    signet (0.8.1)
+      addressable (~> 2.3)
+      faraday (~> 0.9)
+      jwt (>= 1.5, < 3.0)
+      multi_json (~> 1.10)
     simple_grid_rails (0.1.0)
     spring (2.0.2)
       activesupport (>= 4.2)
@@ -319,6 +357,7 @@ GEM
       ethon (>= 0.8.0)
     tzinfo (1.2.4)
       thread_safe (~> 0.1)
+    uber (0.1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     useragent (0.16.8)
@@ -346,6 +385,7 @@ DEPENDENCIES
   faraday
   faraday_middleware (= 0.10)
   font-awesome-rails
+  google_drive
   haml-rails
   jbuilder
   jquery-rails
diff --git a/scripts/kodaira_ss.rb b/scripts/kodaira_ss.rb
new file mode 100644
index 000000000..a98ba7dcb
--- /dev/null
+++ b/scripts/kodaira_ss.rb
@@ -0,0 +1,52 @@
+# For Kodaira's dojo event histories
+#
+# Google spread sheet url
+# https://docs.google.com/spreadsheets/d/15oTUF20IBQ99taJb3BO10Xpbn0tR-c_xmTJQUwH2M38/edit#gid=1633991574
+#
+# google-drive-ruby(for Google API)
+# https://github.com/gimite/google-drive-ruby/blob/bc8d27b1c4f7369bba6e308525377444c3932364/doc/authorization.md#on-behalf-of-you-command-line-authorization
+
+SPREAD_SHEET_KEY = '15oTUF20IBQ99taJb3BO10Xpbn0tR-c_xmTJQUwH2M38'.freeze
+WORK_SHEET_NAME = '参加'.freeze
+KODAIRA_DOJO_ID = 13
+
+def col_index(str)
+  col = 0
+  str.upcase.each_byte do |b|
+    col = col * 26 + (b - 0x41) # 0x41: 'A'
+  end
+  col
+end
+
+if ARGV.empty?
+  puts 'Usage: bin/rails r scripts/kodaira_ss.rb CONFIG_JSON_FILE'
+  puts
+  puts 'Require the json file of configurations for Google API'
+  puts 'see: https://github.com/gimite/google-drive-ruby/blob/bc8d27b1c4f7369bba6e308525377444c3932364/doc/authorization.md#on-behalf-of-you-command-line-authorization'
+  exit 1
+end
+
+puts 'CoderDojo小平の統計情報スプレッドシートを解析します'
+
+conf = File.expand_path(ARGV[0])
+session = GoogleDrive::Session.from_config(conf)
+ss = session.spreadsheet_by_key(SPREAD_SHEET_KEY)
+ws = ss.worksheets.find { |s| s.title == WORK_SHEET_NAME }
+
+# A:通番, C:日付, G:時間, K:合計参加者
+res = ws.rows.each.with_object([]) do |row, arr|
+  serial_number = Integer(row[col_index('A')]) rescue nil
+  next unless serial_number
+  next unless arr.length == serial_number - 1
+
+  arr << {
+    'dojo_id' => KODAIRA_DOJO_ID,
+    'evented_at' => "#{row[col_index('C')]} #{row[col_index('G')].split('-').first}",
+    'participants' => row[col_index('K')].to_i
+  }
+end
+
+output = File.open("tmp/kodaira_histories_#{Time.zone.now.strftime('%Y%m%d%H%M%S')}.yml", 'w')
+YAML.dump(res, output)
+
+puts "#{output.path}にCoderDojo小平のEventHistoryのデータソースを書き出しました"