単語レース -脳トレ言葉ゲーム- is an Android game developed by HENN Inc. It is a free word game that challenges players to come up with as many words as possible based on given themes. With a variety of fun themes such as animal names and sushi ingredients, players can test their knowledge and vocabulary.

The game is designed to be a race, where players compete against each other to see who can come up with the most words in a given time frame. The speed of flicking and memory skills are key factors in winning against opponents. With short stages, the game is popular as a casual time killer.

単語レース -脳トレ言葉ゲーム- is also known as the "Yamanote Line Game" or the "Kokon Tozai Game" in some circles. The game features cute illustrations from "irasshaimase" and free materials from "RINGLOGIC" and "Maou Damashii."

Please note that the game is only available in Japanese.