東京メトロ (Tokyo Metro) is a major subway system in Tokyo, Japan. It operates nine lines that cover a vast area of the city, making it one of the most efficient ways to travel. The system is known for its punctuality, cleanliness, and safety, serving millions of passengers daily. Founded in 1927, 東京メトロ is part of the larger public transportation network in Tokyo, which includes 都営地下鉄 (Toei Subway) and JR東日本 (East Japan Railway Company). The subway connects key areas, such as 新宿 (Shinjuku) and 渋谷 (Shibuya), facilitating easy access to shopping, dining, and entertainment.