Marble Ogura Cake recipe

Selam everybody...Merhaba from Turkey. Ogura cake, aka 相思蛋糕 / Xiāngsī dàngāo . No official sources why this cake name Ogura (Japanese language). Is it coming from Japan or invented in Japan or whatsoever. It's just this cake become very popular among Asian baker and Asian cake lover. The texture incredibly cotton soft, light and smooth texture with moist crumb. Rich in flavor yet light in