square key; heart-shaped key;  dark blue finish key with white Akane Umino logo;

Akane Umino is a marimba player who collaborates with Mr. Hiroshi Chu Okubo;

here is the video where she plays on steel pan the composition Vermillion from Mr. Okubo: 

https://www.youtube.com/watch?v=mZ0yKjCd-CM

育てるドラムチューニングキー / 大久保宙シグネチャードラムチューニングキー

Many thanks to Mr. Okubo for his help in obtaining these keys and for his educational work; thanks Hiroshi!