"産経新聞 ENAK 元極楽とんぼ・山本圭一容疑者を書類送検" [Former Gokuraku Tombo member Keiichi Yamamoto is referred to prosecutors]. www.sankei.co.jp. Archived from the original on 2009-03-06. Retrieved 2024-06-30.
"産経新聞 ENAK 元極楽とんぼ・山本圭一容疑者を書類送検" [Former Gokuraku Tombo member Keiichi Yamamoto is referred to prosecutors]. www.sankei.co.jp. Archived from the original on 2009-03-06. Retrieved 2024-06-30.