Which Actor Plays Kamen Rider Grease In Kamen Rider Build?

I get a little giddy whenever 'Kamen Rider Build' comes up in conversation, so this is a fun one to talk about. The guy who suits up as Kamen Rider Grease is Kouhei Takeda — he brings this gruff, honorable energy to the role that really sold me on Grease’s whole ‘old-school leader with a soft spot’ vibe. His performance gives the character that lived-in, world-weary tone that contrasts so well with Sento’s chaotic genius and Ryuga’s brashness, and I still replay some of his scenes when I’m in the mood for a ride that’s equal parts action and quiet heartbreak.

I say this as someone who binged the series over a week while nursing cold coffee and scribbling down character notes — Grease’s arc feels like a late-night conversation with a friend who’s been through a few too many storms. Kouhei Takeda’s portrayal makes the Rider moments pop: when Grease transforms, there’s a sense that this isn’t just flashy tech, it’s a tool forged from responsibility. Off-duty scenes have this lovely groundedness; he’s not trying to be performative, he’s subtly carrying the weight of leadership, and that’s why the clashes and reconciliations in the latter half of 'Kamen Rider Build' land so hard.

If you haven’t watched Grease’s key episodes yet, I’d recommend starting around the mid-season arcs — the episodes where the politics of Sokichi’s world and the Hokuto faction start unraveling. That’s where Kouhei’s acting layers peel back: quiet looks, small gestures, and the occasional raw outburst. It feels like he’s reading the script as a chance to tell a real human story inside a tokusatsu suit, which, as a long-time fan who’s seen tons of Rider shows, is always a joy. Also, his chemistry with the rest of the cast — especially during the more melancholic bits — gives the whole season extra emotional weight.

If you want to dive deeper, look for interviews and behind-the-scenes clips where Kouhei talks about preparing for the role; they’re really illuminating about his approach to Grease’s morality and physicality. And if you’re just here for watching, cue up the episodes where Grease first appears and then follow his arc through the mid to late season — it’s a satisfying ride. I always end up replaying one scene in particular (you’ll know it when you see it) that perfectly captures why Kouhei Takeda’s take on Grease stuck with me long after the credits rolled.