It is generally easy to find a taxi in Tokyo at night, especially in popular areas, near train stations, and in major commercial and entertainment districts. Most taxi companies continue to operate throughout the night, and you can usually find them at designated taxi stands, outside hotels, and near busy nightlife areas. Additionally, you can also hail a taxi on the street if the "vacant" (空車) sign is lit, indicating that the taxi is available for passengers. However, it's important to note that taxis can become less available during late hours, especially in less populated or residential areas.