Deresque has a blog entry with a lot of pictures from a lunch last month he had with 13 other competitive eating friends at the Grand Buffet Hawaiian Island in Tokyo. The fourteen eaters were grouped into 7 two person teams and each member was weighed before and after eating lunch at the buffet. The team with the highest combined weight gain was proclaimed the winner.
The top 5 single person weight gains were:
1. Takuya Yamamoto, 23.76 lb. / 10.8 kg (54.3 kg -> 65.1 kg), on #1 team
2. Mio “Sakura” Takahashi 15.2 lb. / 6.9 kg (31.3. kg -> 38.2 kg), on #2 team
3. Tomoko Miyake, 14.3 lb. / 6.5 kg (38.2 kg -> 44.7 kg) on #2 team
4. Asami “Essen” Miyanishi, 13.4 lb. / 6.1 kg (unlisted start & finish) on #3 team
5. Yamaguchi 12.32 lb. / 5.6 kg (60.6 kg -> 66.2 kg), on #1 team
Sakura Takahashi had the highest percentage weight gain, 38.2 / 31.3 = 22%, edging out Takuya Yamamoto, 65.1 / 54.3 = 20%