There is no monolithic preference among Japanese men—or any national group—for women of a specific nationality, ethnicity, or background. Attraction is deeply individual, shaped by personality, shared values, chemistry, and life circumstances, not passport or heritage.
Successful relationships between Japanese and Indian individuals (or any cultures) typically thrive on:
Japan-India couples exist and flourish, as do couples from every conceivable pairing. Tokyo and other cities have growing international communities. Dating apps, universities, workplaces, and cultural events create organic meeting grounds. The only "preference" that matters is the individual's.
Bottom line: Ask "Would this person and I connect?" not "Do Japanese men like Indian women?" The latter question erases agency and humanity on both sides.