I and my older brother had a darkroom setup at home in Santa Monica in the 70's and we did bulk-roll Tri-X, but this wasn't anything we had exposed as I didn't recognize cartridge type nor the handwriting on the label. So, I had the film exposed 33 years previously developed by Blue Moon Camera in Portland, OR.
The quality of the developed film wasn't high. The contrast was low and they had a crazing pattern, although in some ways the unexpected changes gave a certain aesthetic to the photos. You can find the complete set of photos here.
Most of the photos were of Japan, including a Buddhist monastery:
I've had no luck determining what temple this is.
But I was able to find out that some of the photos were taken in Kurashiki, Japan (discovered through this Ask Metafilter question). Here's the a bridge across a canal (the characters mean "Central Bridge"):
Here's the same bridge a building on Google Street View:
Here's another building on the canal in Kurashiki, and its Google Street View 30 years later:
There were also a few photos of the Santa Monica Pier and one of the front of our house in Santa Monica.
I still have no idea who took these photos. The photographer clearly had skill. The best guess I can make of how my father ended up with the roll of film was that the photographer was a friend or colleague of my father just returning from a trip to Japan, and during a visit to us in Santa Monica finished up the roll film and inadvertently left it at our house.
Perhaps these two photos can give a hint:
A friend of the photographer? Self-portraits? No one I've reached out to have been able to recognize this person.
I end this post with this curious and somewhat creepy image of a room in 1977:
It leaves me wondering: Where is this? What's in the picture frames? What's behind that door? It just adds to the mystery of this roll of film.