- The document discusses "appengine ja night", a monthly community event in Japan for App Engine developers that has been running since October 2009. - It provides details on the topics and speakers covered at each event, with sessions on things like best practices for production apps, DSL development, transactions, testing, and more. - The events are held in Tokyo, Kyoto, and Sapporo and typically attract 100-200 attendees each month to learn about techniques for building applications on Google App Engine.

1. appengine ja night review @kazunori_279

4. appengine ja night sessions Date Sessions # of regs Place ajn#1 Oct 2009 "JDO pitfalls" by @higayasuo "Low Level API + Unit testing" by @shin1ogawa 31 Google Tokyo ajn#2 Oct 2009 "JDO pitfalls" by @higayasuo "Low Level API + Unit testing" by @shin1ogawa 73 Recruit MTL ajn#3 Dec 2009 "Best practices on production apps" by @bluerabbit777jp "How to create a scalable apps" by Takezaki-san 71 Gree ajn#4 Jan 2010 "DSL driven development on GAE" by @asami 224 "App Engine transaction puzzlers" by @ashigeru 95 Recruit MTL ajn#5 Feb 2010 "App Engine Anti-patterns" by @tmatsuo "Global Transaction" by @higayasuo 124 Gree ajn#6 Mar 2010 "Global Transaction" by @ashigeru and @higayasuo 127 Recruit MTL ajn#7 Apr 2010 "Unit testing on GAE" by @shin1ogawa "GAE Q&As" by @shin1ogawa 140 Gree ajn#8 Jun 2010 "Using GAE on building Sport SNS site" by @najeira "Fast aggregation by skip list" by @koher 130 Recruit MTL ajn#9 Jul 2010 "Understanding Query" by @bufferings "Next Gen Query" by @kazunori_279 108 the Canteen ajn#10 Aug 2010 "Slim3 on App Engine" by @higayasuo "Mirah and Dubious" by @headius and @johnwoodell "Google Apps Marketplace + GAE" by @nakajiman "DaVinciPad on GAE/J" by @shumpei 120 Google Tokyo