Kawashima-san, Nagayama-san's long term assistant, has left Daisan Harumi. I understand from the restaurant that they may no longer open on Saturdays because of that (Kawashima-san used to be in charge on Saturdays whilst Nagayama-san has other engagements). Beyond tragic.
They did not divulge why he left, and it was not appropriate to ask in front of a full restaurant, so I acknowledged the information without further query. If anyone knows, I would be very grateful if you could share the information. If he is opening his own shop, I want to go to it.