Lesson 4 of Minna no Nihongo I introduces beginners to vocabulary related to time, days, months, and basic numbers. This lesson helps learners talk about dates, days of the week, and simple counting, which are essential for daily communication. Key vocabulary includes numbers 1โ10, 100, 1,000, 10,000, days of the week such as โใใคใใใณ (getsuyoubi) โ Monday,โ โใใใใณ (kayoubi) โ Tuesday,โ months like โใใกใใค (ichigatsu) โ January,โ โใซใใค (nigatsu) โ February,โ and expressions for asking about time and dates, such as โใชใใซใก (nannichi) โ what day?โ. The lesson also emphasizes using counters for days, months, and years, which is important in Japanese. Strategies for mastering Lesson 4 vocabulary include repetition, writing numbers and dates, flashcards, and practicing asking and answering questions about time, which reinforce memory and practical usage. Practicing this vocabulary allows learners to ask about dates, tell the day of the week, count objects, and communicate basic time-related information. Lesson 4 vocabulary builds a strong foundation for practical communication and supports further learning in subsequent lessons of Minna no Nihongo I.