He has racked up a number of technical epics in the last couple years, in part thanks to the promotion known as MUTOHA, since that is their signature style and they were gracious to make a lot of footage available that was hidden in storage for over a decade, but also in a number of other promotions whenever they let him do stuff. The 60 minute match he had with Arai is insane, and possibly a greater 60 minute long technical epic than almost anything from the classical era, which is pretty crazy.
Other notable GENTARO matches:
vs El Samurai, FREEDOMS 9/27/2009
vs Osamu Nishimura, VKF 11/16/2015
vs Akira Jo, Mutoha 7/7/2024
vs Dekai Ichimotsu, 4/15/2018
vs Yasushi Sato, Mutoha 3/19/2022
vs Hiroshi Watanabe 5/30/2009
vs Yuki Ishikawa, Batos Cafe 2/23/2020
vs Kazuhiro Tamura, Mr. Gannosuke Produce 3/31/2011
vs Kenichiro Arai, Masamune Produce 6/19/2022
Obviously the times are on his side, with him making tape often and even smalltime performances like the match against Ichimotsu being uploaded by generous providers, but it's hard to deny that his resume stacks up extremely well even against top tier wrestlers. It's a really impressive reinvention when you consider he transformed into the technical master only after suffering a stroke and has been a very different but also great wrestler up until that point.