The Japanese garden, which covers about 20,000m² and is surrounded by three Hotels – The Prince Sakura Tower Tokyo, Grand Prince Hotel Takanawa, and Grand Prince Hotel Shin Takanawa – is adorned with flowers, trees, and ponds, that change with the seasons. It is also dotted with historic and artistic sites. In 2021, the garden’s Kannondo Hall, Bell Tower, and Sanmon Gate were designated as tangible cultural properties by Minato Ward.