is demon slayer: kimetsu no yaiba episode 34 filler?

After completing their mission at the Mugen Train, Tanjiro and his comrades have been spending their days recuperating at the Butterfly Mansion. In order to deliver Kyojuro’s last message, Tanjiro decides to head to the Rengoku residence.

There, Tanjiro becomes infuriated when he encounters Kyojuro’s father, Shinjuro, who insults the deceased Kyojuro. However, Shinjuro sees Tanjiro’s earrings and suddenly becomes enraged.

What will Tanjiro discover at the Rengoku residence?