Giving a lecture for earning money (tuition fee) was called iku-ko (literally, rice porridge lecture), and after Kinga, everyone who opened a private school ('juku' in Japanese) at Komagome followed Kinga's way of making a living by providing the iku-ko (lectures for sale).
このような受講料を得て講義することを粥講（いくこう）というが、以降駒込にて塾を行うものはすべて金峨に倣ってこの粥講（売講）をして生計を立てた。