When drawing Tanjiro fan art or creating Tanjiro’s earrings from Kimestu no Yaiba, please be mindful of how you draw the earrings.
I bought a Tanjiro keychain and later realized that the earrings were drawn with red lines… That’s the Rising Sun flag. It is an extremely offensive flag with a lot of history behind it (you can Google it). I’m not writing this to put anyone on blast because I believe this was an honest mistake, but please be careful.
Now in the manga, the earrings have black lines with a red outline. I do not think that the creator had bad intentions. I believe the creator went for a flower card design but it happened to look like the flag. Even with the black lines, some people may still perceive it as a racist and offensive symbol. The studio made the conscious decision to change the design and that is awesome. This is a really important topic and it should not be downplayed.
The creator of My Hero Academia received a lot of backlash from Chinese and Korean fans recently due to something similar. Some fans even burned their MHA manga. The creator said he was unaware, which kind of shows the lack of history taught in Japan’s educational system.