A brief book translated into Japanese contains the most important matters that a Muslim needs in his life from the Quran, its explanation, jurisprudence, creed, virtues, etc. It is divided into two parts: (1) Explanation of the last three Quranic parts from the book "Zubdat At-Tafsir" (Best Book of Tafsir) by Shaikh Muhammad ibn Sulaiman Al-Ashqar, (2) Different Islamic matters that a Muslim concerns such as tajweed rules, 62 questions about Islamic creed within a calm dialogue, rules of the two testimonies of faith, purification, prayer, zakah, pilgrimage, supplicating and remembering Allah, etc.