This is a great lesson using the four conjunctions (and, then, but, so) in past tense sentences. It has been tried and the result was a fun lesson that went by quickly.
No answers allowed is a great warm up for English conversation classes. It is quite an old game, and is sometimes a drinking game, but it can also work a conversation class starter game.
The Japanese language has fewer sounds (phonics) than the English language. So while some of the sounds are the same, there are a few that are new and a few that are hard for the Japanese ear to pick up. This game challenges students to listen for the difference in words that sound very similar.
This is an old party game, but it works well as a way to practice asking questions in the format "Am I...?" for conversation classes as an easy to prepare for game or warm up.