Hikaru no Go

Both of them are about someone who loves the sport who meets someone who doesn't, but learn to love it.

Hikaru no Go has a really nice atmosphere, just like Shiko Funjatta, it's heartwarming and realistic in some aspects. I love both of them equally, and for me, they are similar.

Bromance/soulmates, in both series there are two MLs, who care and support each other, while also stimulating each other's growth and aspire each other, both cover long period, 1 year in RLASS and 10+ in Hikaru, MLs personal growth - physical and psychological.

It's korean drama but It has similar story and the Go prodigy too
they are very similar in friendship relationships and Go players how their life isn't that easy and they triumph in their game that they love