Tama Tegata by Miyabe Miyuki.
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Amazing book about the Mishimaya 三岛屋 shop that also hosts a Hyakumonogatari 奇异百物语(listening intently to another's stories, and forgetting about the contents right after).
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It's a sacred ceremonial act, with an emphasis on non-judgemental acceptance - regardless of whether the stories are truths or lies, everyone feels compelled to tell tales and verbalize their version of what happened.
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The second son of Mishimaya 富次郎 has imposter syndrome, and fears that he's not doing a good job compared to his predecessor