I have too many favorites to list all of them, but here's a small list. I tried to include a mixture of new and old movies.
Japan:
Sansho the Bailiff (1954)
Harakiri (1962)
The Face of Another (1966)
Pastoral: To Die in the Country (1974)
Tampopo (1985)
Love Exposure (2008)
South Korea:
The Shower (1979)
Why Has Bodhi-Dharma Left for the East? (1989)
Barking Dogs Never Bite (2000)
Castaway on the Moon (2009)
The Handmaiden (2016)
China (mainland):
In the Heat of the Sun (1994)
Back to Back, Face to Face (1994)
Suzhou River (2000)
HK:
The Killer (1989)
Green Snake (1993)
A Chinese Odyssey (1995)
In the Mood For Love (2001)
Taiwan:
Dragon Inn (1967)
A Summer at Grandpa's (1984)
A Brighter Summer Day (1991)