This page lists the official accounts of Seiji Kobayashi (Yomiuri Giants), checked across Instagram, X, Threads, TikTok and YouTube. Official accounts confirmed on Instagram, Threads (as of 15 October 2026). Platforms we could not confirm are clearly marked as "no official account" or "not confirmed".
| @seiji.k__ Verified | 118,830followers (at time of check) | Open | |
| X | Not confirmed | ||
| Threads | @seiji.k__ Verified | Open | |
| TikTok | Not confirmed | ||
| YouTube | Not confirmed |
"No official account" means the official website or profile lists its social accounts and this platform is not among them; "not confirmed" means public information was not enough to decide. In both cases no official account has been confirmed — an account with the same name may be an impersonator. Follower counts are as recorded at the time of checking.
Yes. The official account @seiji.k__ has been confirmed (checked 15 October 2026). followers: 118.8K (at time of check). Open the official account
Not confirmed. When we checked on 15 October 2026, public information was not enough to confirm an official X account. No official account has been confirmed.
Yes. The official account @seiji.k__ has been confirmed (checked 15 October 2026). Open the official account
Not confirmed. When we checked on 15 October 2026, public information was not enough to confirm an official TikTok account. No official account has been confirmed.
Not confirmed. When we checked on 15 October 2026, public information was not enough to confirm an official YouTube account. No official account has been confirmed.
On 15 October 2026 we confirmed that the accounts are listed or linked as theirs on the following official pages:
https://www.giants.jp/players/
http://ja.wikipedia.org/wiki/小林誠司
https://www.instagram.com/seiji.k__/
https://www.threads.com/@seiji.k__
The accounts on this page were confirmed as theirs on the following pages (checked 15 October 2026). Verification badges are not used as evidence.