`Kokoro' is a beautifully written book with a deep underlying sadness running throughout it.
This is the story of a young man (the narrator) who befriends an older man, who he calls Sensei. There is a mystery and sadness about Sensei that intrigues the narrator which only comes to light after he goes home to care for his dying father and he receives a letter of Sensei's life story.
Like I mentioned, this has a sadness running throughout it and whist some passages and sentences stand out for their beauty and structure, overall it is the melancholy aspect of this book that I was left with.
The story is quite slow paced and whilst I found it intriguing, I will admit I found it hard to motivate myself to continue with it at times. The translation from Japanese can make it feel a touch stilted at times, but all in all it was a good read.
There is also an introduction exploring the themes of the book which is worth a read, but only after you have finished as it includes some spoilers.
I have read other Japanese literature that I have enjoyed more (notably the work of Yukio Mishima) but this is still a worthy addition to your Japanese literature bookshelf and worth a read at some point.
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