If you haven’t seen the recent Shogun tv series - I’d recommend that.

• House (1977)
• The Drifting Classroom.(1987)
• The Happiness of the Katakuris (2003)
• Summer Time Machine Blues (2005)
• Executive Koala (2006)
• Big Man Japan (2007)
• Fish Story (2009)
• HK: Hentai Kamen (2013)

• Takeshi Kitano: Boiling point, Violent Cop, Hanna Bi
• The recent Shin Godzilla
• Your Name
• Seven Samurai
• Battle Royale

Perfect Blue by Satoshi Kon is fantastic.

If you liked Squid Game, consider Oldboy

I think I saw "One Cut of the Dead" with subtitles on a plane, so I assume subtitles are an option. https://www.imdb.com/title/tt7914416/

I didn't expect to like it, but ended up liking it by the end of the movie.

Casshern (the 2004 live film not the original anime)

e......maybe there are some probability that Japanese movie is famous for tokyohot

Ikiru. Harakiri. The Human Condition. Mishima: A Life in Four Chapters.

Anime Sci-Fi classics that you might already have seen:

Akira (1988)

Ghost in the Shell (1995)

If you're ok with abstract cinema:

Tetsuo the Iron Man (1989)

Visual appeal:

Metropolis (2001)

Not Sci-Fi, but one of my favorite films of all time:

Cure (1997)