In Ino-cho, Agawa-gun, Kochi Prefecture, which is active in the production of Japanese paper, koi-nobori made with Japanese paper that does not rip when dampened is released into the Niyodo-gawa River, so on boat tours one can see koi-nobori swimming in the river.
和紙の生産が盛んな高知県吾川郡いの町では水に濡れても破れない和紙を用いて作られた鯉幟が仁淀川に放流され川下りをしながら水中を泳ぐ鯉幟を遊覧できる。