Seems like these two fights are the same fight and opponent --
1933-11-01 John Yasui 20-10-2
Los Angeles, CA, USA W PTS 6 6 wouter|wouter
Exact date unknown / Held in November 1933
1933-11-04 Johnny Lasui 0-0-0
Main Street A.C., Los Angeles, CA, USA NC NC 6 8 RIC|RIC
When Referee Frank Van stopped the bout, the fans stormed the ring until the police were called. Result uncertain: Lasui may have been declared the winner, resulting in a "curious verdict."