see https://www.inaturalist.org/flags/565564

Bufo sachalinensis
Amur River basin of Liaoning, Jilin and Heilongjiang, China, and adjacent Russia, including Sakhalin I.; Korean Peninsula.

Bufo gargarizans
Northeastern China south through central and eastern China south to high elevations of Guangxi and Yunnan and west through Sichuan and Qinghai, to Xizang; Dibang Valley of Arunachal Pradesh, India (see comment); Ha Giang Province, Vietnam; Miyakojima, Ryukyu Is., Japan; introduced onto the islands of Kita Daitojima and Minami Daitojima and into the northern part of Okinawa. See comment.