I couldn’t verify a specific “fighting undergrounds” location in Gakuran from the available results, but the game appears to be a Roblox fighting/roleplay title where access may depend on the current map, group access, or an in-game route rather than a fixed public portal.

What to try

  • Check the game’s spawn area and nearby map edges first, since underground fight zones in Roblox games are often reached through ladders, hidden doors, tunnels, or stairs.
  • Look around the school, karate/training areas, and any basements or back-alley entrances, because fight-related locations are commonly placed near combat trainers or event hubs.
  • Join the official Roblox group or community linked to the game, since one result says you may need to join the group to play Gakuran.

Quick clue

A recent Gakuran video focuses on combat controls and PvP tips rather than a separate “underground” menu or teleporter, which suggests the area may be an in-world location you walk to instead of a lobby option.

Best next step

If you want, I can help you narrow it down by checking whether “fighting undergrounds” is a map area, a private server feature, or a fan nickname used by players in Gakuran.