In Yakuza 0, the game provides players with the ability to navigate the bustling streets of its fictionalized versions of Kamurocho and Sotenbori through various means, with taxis being the most prominent method for fast travel.

Taxis:
– Functionality: Taxis allow players to quickly travel between key locations on the map for a fare. This feature is particularly useful in scenarios where players wish to move swiftly to a specific destination or avoid engaging in conflicts with enemies.
– Accessibility: Players can hail a taxi at any point during free-roam, making it convenient to jump across the city without having to traverse the streets on foot.
– Time Efficiency: Although traversing the city can be enjoyable, utilizing taxis significantly cuts down on travel time, thus enhancing gameplay flow especially during quests or missions that require rapid movement.

Telephones:
– Functionality: While telephones are available for use in the game, they do not serve as a means of fast travel. Instead, they are used mainly for story-related tasks such as contacting characters or progressing through the narrative.
– Role in Gameplay: Telephones are pivotal for gameplay but are distinct from the fast travel mechanics, focusing on plot development rather than transportation.

In conclusion, taxis are the exclusive fast travel option in Yakuza 0, facilitating quick movement across the vibrant cityscapes, while telephones play a crucial role in narrative and character interactions but do not aid in fast travel. Players can leverage taxis for efficient play, optimizing their experience in the thrilling world of Yakuza 0.