Home-Plate Umpire Kazuyuki Shirai (49) Shows Up as an Idol Fan — 5ch: ‘Honestly, Shirai’s the Only Umpire Anyone Knows’

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The story

It’s become a hot topic that veteran NPB home-plate umpire Kazuyuki Shirai (49) attended a photo-book handshake event for Karen Hara (25), a talent and former NMB48 member. Hara herself reported on social media that “umpire Mr. Shirai graced us with his presence,” and photos surfaced showing him responding with his signature “K-pose” — the gesture he makes for strike calls, which he says is inspired by the “K” in AKB48. Shirai has previously appeared in photos with other former NMB48 members like Sayaka Yamamoto and Chihiro Kawakami, and his die-hard NMB fandom has been known for some time. On 5ch, the thread was a mix of people surprised by this unexpected side of him and others criticizing it as unbecoming of an umpire.

“Wait, he’s into idols?!” — NPB’s famous umpire shows up at an event for an idol nicknamed “Ori-Hime” (lit. “princess”), stunning baseball fans

NPB umpire Kazuyuki Shirai visited an event for talent and former NMB48 member Karen Hara (25). Reactions like “Wait, he’s into idols?!” reveal an unexpected side of him that’s now trending online.

“No way, seriously?? lol” “What are you even doing lol” — Umpire Shirai strikes his “K-pose” at an idol event 【actual post】

Source: news.yahoo.co.jp / Original article here

What people said

6AnonymousNov 6, 2026 21:30
Karen Hara @karen_hara315 (Nov 1, 2026, 10:12:37 PM)
And today, umpire Mr. Shirai showed up!!

He graced my photo handshake event with his presence — thank you so much!!
Congrats on your 2000th game umpired (congrats)! Your big voice always gives me energy too.
I'll keep cheering you on!

It's a strike, and also Karen's K
#TotalStrike (a pun on "dead-on strike" / "exactly my type") Aaaay!!!!☆
https://ohayua.cyou/twimg/HWCsIORbwAAgc3_.jpg
https://x.com/karen_hara315/status/2116881096348668165
11AnonymousNov 6, 2026 21:31
Re: #6
This has gotta be mocking him, right?
19AnonymousNov 6, 2026 21:33
This is seriously tanking his public image.
22AnonymousNov 6, 2026 21:34
Roki (presumably pitcher Roki Sasaki): "Dude, what are you even doing? lol"
27AnonymousNov 6, 2026 21:34
Guys like Shirai — good-looking and famous — are bound to be popular with women.
28AnonymousNov 6, 2026 21:35
Wait, hold on — the cover of that photo book…
is that really okay?
31AnonymousNov 6, 2026 21:36
He's dressed like a hardcore idol fanboy.
Is he broke or something?
35AnonymousNov 6, 2026 21:37
Re: #31
That's basically the otaku uniform.
38AnonymousNov 6, 2026 21:40
From Wikipedia:
> When making a strike call, he forms a "K" shape with his fingers. He's said himself it's inspired by the "K" in AKB48.

LMAO
40AnonymousNov 6, 2026 21:41
How does an idol even know an umpire's face and name?
Is Shirai going around telling people himself, "I'm Shirai, the pro baseball umpire"?
Is he such a regular that he's actually gotten recognized?
45AnonymousNov 6, 2026 21:43
Say what you want, but Shirai's basically the only umpire anyone actually knows by name.
52AnonymousNov 6, 2026 21:45
Shirai's gotta be single, no question.
If he had a wife and kids and pulled this, it'd be instant divorce.
67AnonymousNov 6, 2026 21:51
Re: #52
If the kids are already grown and out of the house,
he's free to do as he likes.
55AnonymousNov 6, 2026 21:46
Didn't expect him to be dressed like some teenage fanboy.
58AnonymousNov 6, 2026 21:47
His face looks stretched long in photo 1 and his legs look stretched long in photo 5 — can we stop with the editing already.
60AnonymousNov 6, 2026 21:48
The last one is overedited to an absurd degree.
There's no way his legs are actually that long…
63AnonymousNov 6, 2026 21:50
Umpire Shirai's idol-otaku side hustle

Sayaka Yamamoto (former NMB48)


Chihiro Kawakami (former NMB48)
68AnonymousNov 6, 2026 21:51
Can't something be done about that voice of his that sounds like a screeching cat?
70AnonymousNov 6, 2026 21:52
NMB48's Sayaka Yamamoto with Shirai
https://ohayua.cyou/twimg/HOMll6waUAESfqq.jpg
NMB48's Chihiro Kawakami with Shirai
https://ohayua.cyou/twimg/HUMVPDZasAANs13.jpg
81AnonymousNov 6, 2026 21:58
Re: #70
So THAT'S why Shirai's been going easy on the Hanshin Tigers lately.
75AnonymousNov 6, 2026 21:54
Do people even normally know the names of home-plate umpires?
78AnonymousNov 6, 2026 21:56
Re: #75
He's Roki Sasaki's nemesis.
89AnonymousNov 6, 2026 22:00
Re: #75
In pro wrestling, referees like Red Shoes Dugan, Oki Shikina,
Joe Higuchi, Mr. Takahashi, and Tiger Hattori were well known,
but in pro baseball there aren't many umpires people actually recognize, I guess.

Background and Key Points of This Topic

Umpire Kazuyuki Shirai’s “K-pose” for strike calls is, as he himself has said, a reference to the “K” in AKB48, and it’s long been known as a rare public example of an NPB umpire being an openly avid idol fan. In fact, photos of him with former NMB48 members Sayaka Yamamoto and Chihiro Kawakami have circulated before, so his appearance at Karen Hara’s event looks less like an isolated incident and more like an extension of this ongoing personal pursuit. Where opinions on the thread diverged was over how much weight to give someone’s private behavior when judging them in a public role like an umpire. Comments ranged from “as long as it doesn’t affect his calls on the field, he should be free to do as he likes” to “unbecoming behavior for someone in his position at 49.” It’s also worth noting, as a reader, that Karen Hara is a 25-year-old adult talent, the event was reported on favorably by her own social media, and nothing in the thread actually substantiates any wrongdoing on Shirai’s part.

*This article is compiled as an excerpt/summary of the 5ch (Geisokuho+) thread “【Baseball】Home-Plate Umpire Kazuyuki Shirai (49) Attends Gravure Idol Karen Hara’s Event — Fans Stunned.”

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