Vintage 80s Monkey Stationery from Japan--Unique, with Translucent Envelopes

Vintage from the 90s. I'm the original owner. Cute, unique stationery with frosted, translucent envelopes. I believe this is from Japan. 4 sheets + 2 envelopes (not sure of original counts). There's a very slight crease on 3 of the sheets, but I honestly don’t think this would bother most people. Paper (with flap folded): 6-3/8” x 7-15/16”. Envelope: 4-3/16” x 6-7/16”. SFPF home.