Links

Youtube
https://www.youtube.com/@KseraTV

Instagram ( Katsuyuki.sera )
https://www.instagram.com/katsuyukisera

note
https://note.com/ufa

X
https://x.com/katsuyukisera

TikTok
https://www.tiktok.com/@kseratv

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SERA HOLDINGS
https://seraholdings.co.jp/

MARIN BIKES JAPAN
https://marinbikesjapan.com/

ARESBIKES
http://aresbikes.com/

DELIGHTED
http://delighted-japan.com/

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