Table: fighter_results_20
Columns: res
record
opponent
method
event
round
time
location

Question: Which event was in Tokyo, Japan and had an opponent of rumina sato?
SQL: SELECT "event" FROM fighter_results_20 WHERE "location" = 'tokyo, japan' AND "opponent" = 'rumina sato'

Question: Which round was 2:30?
SQL: SELECT "round" FROM fighter_results_20 WHERE "time" = '2:30'

Question: Which event had the opponent of shinya aoki and was at 4:56?
SQL: SELECT "event" FROM fighter_results_20 WHERE "opponent" = 'shinya aoki' AND "time" = '4:56'

Question: Which method did pride bushido 10 have ?
SQL: SELECT "method" FROM fighter_results_20 WHERE "event" = 'pride bushido 10'