The document discusses a dark festival held in Gunma prefecture called "Darkness on the Edge of Gunma" that has been held annually since 2009. It is a 3 day event held in late September that features natural scenery sites at night as well as Ruby programming conference sessions. Over 35 people attended the first event in 2009 and attendance has grown each year since with 50 people attending in 2011.

1. Darkness on the Edge
of Gunma

2. toRuby
guRuby

3. Ruby
3
Ruby

4. guRuby
guRuby

7. 2009

8. 2009
35
Dark

9. 2009
toRuby

14. 26th

16. Natural Beauty

17. Dark
toRuby

18. 3:00
toRuby
• Natural Beauty
toRuby

20. RubyKaigi 2010 1

21. RubyKaigi 2010 2

22. RubyKaigi 2010 3

25. guRuby
2011/09/15
50 44
guRuby

27. Darkness on the Edge of Gunma
toRuby