Even as your moderator I found it extremely hard to keep up, so I thought it worth a review to see how many there really are.
Let's see what has appeared in JUST THE LAST TWO YEARS, since COVID slowed the world down a bit (although we have to remember "a new watch" takes years in the planning and creating).
JAN 2020 60th anniversary models
Automatic Hi-Beat
Women's with diamond-set bezel
High-accuracy quartz
Quartz sports with ceramic bezel

3 SPECIAL 60th anniversary watches with hand-wound mechanical 9S64 movement in platinum, yellow gold and titanium
Engraved platinum, manual wind
Jewelry set watch with Spring Drive
New spring drive movement 9RA5 in a diver watch
New high-beat movement 9SA5 in a gold case
Automatic, not high-beat (seconds hand only half red, traditional hands)
Concept watch with constant force tourbillon (not for sale)
Hi-beat with new dual-impulse escapement and 80 hour autonomy (seconds hand all red, new fatter hour hand and 12 index)
Kintaro Hattori commemorative edition remake of original GS in platinum

Remake of original Grand Seiko in gold
NOW MOVING ON TO 2021 now, we find:
White birch tree dials and Series 9 design

4 GMT watches with 4 seasons themes; 2 with hi-beat movements and 2 with Spring Drive
New Spring Drive Chronograph with ceramic bezel and gold highlights

Masterpiece jeweled platinum Spring Drive

Wood grain dial platinum Hi-Beat Kintaro Hattori model
New quartz GMT movement in a sports watch
Platinum hand-engraved case with special thin manual-wind Spring Drive movement

Blue dial inspired by Lake Suwa, new Spring Drive with power reserve on the back, new fatter hour hand and 12 index
Gold Spring Drive with wood grain inspired dial and new hand design

Gold Spring Drive diamond-set case and winter "snowflake" like dial, traditional hands
New Hi-Beat GMT movement in titanium case, with lume (rare in GS)
And that brought 2021 to a close, so now we are into 2022.
White Birch Forest dial with a Spring Drive movement rather than Hi-Beat, and fat hour hand
Two Sports Dial Spring Drive GMT watches - one Spring Drive Chronograph GMT and one regular watch with rotating bezel and lume
Newest Spring Drive movement and newest Hi-Beat, each in a case of new Ever-Brilliant Steel

Whew! I hope this past early morning hour spent building this article is not in vain, and it gets at least one reading!