I’m somewhat surprised that both “graded” and “reader” return 0 results on this forum! I’ve been studying Mandarin on and off for years, but recently found the need to learn some Japanese.
On the Chinese side, I’m making my way through the excellent Mandarin Companion series. For context, these are well known English language stories translated, adapted and localised to China, so that the stories are set in a Chinese environment with Chinese characters. This is far more enjoyable than every other graded reader I’ve encountered.
Is there something similar for Japanese? What are you folks reading?