And I don't just mean baseball, I mean any sport. He is leading the league in many of the hitting categories (triples, HR's, OPS+, SLG, TB) while also being an ace pitching.
Before this year, 1921 Ruth (he had basically given up pitching, but was so dominant hitting) and 2001 Bonds (the 73 HR season where his OB was .515) were widely regarded as the greatest individual seasons in baseball (if you want a pitcher it is probably Bob Gibson in 1968). Shohei compares very favorably to both of those seasons given the pitching component even though he wasn't as dominant a hitter he is the best hitter in the game.
In the NBA, no one comes close to Wilt's 50/25 season when he basically played every minute of every game.
NHL is it basically pick a Gretzy season, though I do think 81-82 is probably the one most people would pick (the 92 goal season).
NFL is so hard because of the positions, but I think Brady in 07 might get the nod.
So assuming Shohei continues on roughly the same pace, where will this season end up in the pantheon of greatest seasons ever?