Sayaka Iwamoto
Japanese fashion model
- Born
- 15 December 1994, Kōriyama
- Age
- 31
Sayaka Iwamoto (born 15 December 1994) is a Japanese fashion model and YouTuber from Kōriyama in Fukushima Prefecture, known online as Usatani Paisen. She was formerly an exclusive model for Ranzuki and Koakuma Ageha. Her YouTube channel, 
Usatani Paisen / Gyaru no Kyōkasho ch, had about 8,270 subscribers in November 2025, and her X account had about 102,000 followers in February 2023.
Sayaka Iwamoto’s social media accounts
3 external identifiers
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