A book translated into Japanese contains the forty Prophetic hadiths that Imam Nawawi chose to be included in this book. Each hadith contains a great Islamic rule. All seekers of hereafter reward have to know and study these hadith, for they include important Islamic bases.
This is a book in Japanese suitable for the non Muslims. It gives information about Islam, Muslims and some scientific miracles proved by the Quran and the Sunnah.