Here's an extremely Kanji Roller with mark WP #154.
This mark is one of the six Miyako kanji roller marks, so reading down the cartouche the symbols are Mi ミ, Ya ヤ, Ko コ. The fourth symbol on the bottom of the cartouche is an encircled Naka 仲, so that might be read as Maru Naka Jin.
The symbol 仲 translates to mean 'relationship'.
This float has excellent provenance have been found by Israel Olivera on the beaches of Poillo Island the Philippines.