The Shinjuku Mitsui Building is a prominent skyscraper located in the bustling area of Shinjuku in Tokyo, Japan. It is a popular destination for both locals and tourists alike, offering a range of attractions and amenities.

History: The building was completed in 1974 and stands at a height of 225 meters (738 feet) with 55 floors. It was designed by the renowned architect Kenzo Tange and was one of the first modern high-rise buildings in Tokyo. The Mitsui Group, a major Japanese conglomerate, owns and operates the building.

Attractions: The Shinjuku Mitsui Building is primarily an office building, housing various businesses and companies. However, it also offers several attractions for visitors. The most notable attraction is the observation deck located on the 52nd floor, known as the Tokyo City View. From here, visitors can enjoy panoramic views of the city, including iconic landmarks such as Mount Fuji on clear days. The observation deck also features a café and a restaurant, making it a great spot to relax and take in the stunning views.

Tips for Visitors:
1. Opening Hours: The Tokyo City View observation deck is open from 9:30 am to 11:00 pm (last admission at 10:30 pm). However, please note that the opening hours may vary on certain days, so it's always a good idea to check the official website or call ahead before your visit.

2. Admission Fees: There is an admission fee to access the observation deck. The fee for adults is around 1,800 yen (approximately $16 USD), while discounts are available for children, seniors, and groups.

3. Best Time to Visit: To avoid crowds, it's recommended to visit the Shinjuku Mitsui Building during weekdays, preferably in the morning or late afternoon. This will allow you to enjoy the views without long queues.

4. Nearby Attractions: While in Shinjuku, you can explore other popular attractions such as the lively Kabukicho district, Shinjuku Gyoen National Garden, and the Tokyo Metropolitan Government Building, which also offers free observation decks.

5. Shopping and Dining: The building houses several shops, restaurants, and cafes, offering a variety of cuisines and shopping options. It's a great place to grab a bite to eat or do some shopping after enjoying the views from the observation deck.

Visiting the Shinjuku Mitsui Building and its observation deck provides a unique opportunity to see Tokyo from a bird's eye view. The combination of stunning vistas, shopping, and dining options make it a must-visit destination for any traveler exploring the vibrant city of Tokyo.