Mangaka. The author of: 
* [[Hanekoi Lion]]
* [[Iwakakeru! Sport Climbing Girls]]
* [[Kimika-san no Sweets Match]]
* [[Renai Flops]]

Japanese name: 石坂リューダイ (Ishizaka Ryuudai)
The other name: チョコボール鷹 (Chocoball Taka)
ishizaka ryuudai