The Japanese word for "Suriname Toad" is pipapipa ピパピパ, a katakanization of "Pipa Pipa."
Another word for "Suriname Toad" is komorigaeru コモリガエル.
Star-Fingered Toad, Pipa Pipa, Common Suriname Toad.
Scientific name: Pipa pipa.
Beware: some kanji that are difficult to handwrite are easy to type on the computer, which may skew the usage statistics.
Wikipedia: Common_Suriname_toad (ピパピパ)