Responses
In general, it's not harmful to occasionally sit on your knees. But if you sit in this position (sit seiza) frequently, it may cause some health problems. Sitting with your legs folded underneath can: Add stress on your knees.
Pls take care of ur health , im not saying u cant sit seiza but dont sit seiza too often ( ̄∇ ̄")
Foreigners are not usually expected to be able to sit in seiza-style for a long time, and an increasing number of Japanese people themselves are not able to do so either. In casual situations, men usually sit cross-legged, while women sit with both legs to one side.