Maybe a slot machine token? Daiei is a grocery chain, I think. Here's a different Daiei token with this explanation: "The Daiei, Inc., based in Kobe, is one of the largest supermarket chains in Japan. In 1957, these tokens were manufactured in mass amounts for a limited time machine appearance in casinos in Japan and later discontinued due to the switch to more modern payout solutions and the machine were taken out after a year so the coins started at nearly nothing with a steep rise in value in recent years" I couldn't find an exact match on Numista or with Image search for ダイエー/Daiei.
The reverse of that coin is the exact same as the front, here is a different coin I found with it, both sides pictured.
Yeah, without spending a lot of time looking for matches under tokens, I'm going to say that's what they are. If you want to spend the time, you might be able to ID them on one of these sites. http://tokencatalog.com http://www.richhartzog.com https://coinsite.com/coin-identifier/ Good luck and let us know if you discover what they are.
