I mentioned that I am a Robert Heinlein fan. I was surprised to find that there was a movie version of one of my childhood favorites, The Door into Summer (2021). And it was made in Japan.
It stars Kento Yamazaki as a young robotics engineer. He works obsessively at a big drawing board at home, often in the company of his pet cat, Pete, and his high-school aged step-sister, Kaya Kiyohara. He has designed an advanced autonomous robot that his small company is almost ready to go into production. Note that this takes place in 1985 - the past for the filmmakers, but the future for Heinlein.
He is visited by his fiancee, Natsuna, the office manager at the company. She is bitchy and controlling, and jealous of Kiyohara. And she has some paperwork, which transfers some of Yamazaki's stock in the company to her. I'm sure that won't be a problem.
The next day in the office, Kiyohara's partner, who runs the business side of the company, calls a shareholder meeting: that's him, Kiyohara and now Natsuna. Him and Natsuna immediately vote to fire Kiyohara and sell the company, robot and all. Kiyohara is stunned - he rushes to his lab to find all of his notes and prototypes gone. He's been screwed iout of his job and his inventions.
So he gets drunk, and decides to go into cold sleep for thirty years. In this futuristic 1985, that is an option. He arranges for a sleep cradle for him self and Pete, but is rejected because he's drunk. He'll need to come back sober. But when he sobers up, be decidesto fight instead of run away.
When he confronts Natsuna and his partner, they drug him and put him into cold sleep, using the paperwork already set up - using a sleazier company, who don't mind taking an unconscious customer. So he wakes up in 2025. He's broke - his investments went south. He is lost, with no friends, no cat, and no way to get in touch with his step sister.
To help ease his transition to the modern world, he is gived a robot companion for five days. This robot, named PETE, played by Naohito Fujiki, is very human, to the point that he seems to be malfunctioning, with humor, whims and sarcasm.
So, even with his robot friend, he is still stuck in a future he doesn't know. But he thinks about his cat Pete. Pete didn't like snow, and would refuse to go out in the winter. Instead, he would meow at every door in the house, hoping that one would be the door into summer (based on Heinlein's actual cat). So Kiyohara starts looking for the door into summer - and finds it (SPOILER - time travel).
This is a sweet, fun movie. Our hero is good and virtuous, the villains evil, and his revenge is sweet. The cat actor who plays Pete is appropriately scornful, but could have used a few battlescars. The retro-futuristic way they handled tech is good, especially when we get to 2025 where everyone has a smart phone, and maybe also a robot.
Also, their are plenty of nice, friendly people in the movie. For instance, in 2025, Kiyohara meets the CEO of a robot company who had met him in 1985 as a child, and considered him an idol. So he doesn't need to do everything alone (or with only a possibly malfunctioning robot).
The romance between Kiyohara and his step sister is tricky - it's clear that she is in love with him, but he doesn't seem to have any evil intentions towards her. In the end, due to cold sleep and time travel, they end up the same age, so they can get together - if you don't mind the spoiler.
I have only one minor quibble: In the book, our hero makes a new fortune by designing a robot drafting table. So Heinlein anticipated CAD, but on paper, not on screens. In the movie, Kiyohara is always behind a drafting boatd, but never automates it. I guess you can't put everything into a movie.