Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 218; Flight Crew Total 19000; Flight Crew Type 1770
Confusion; Distraction; Situational Awareness
Deviation / Discrepancy - Procedural Other / Unknown; Ground Event / Encounter Other / Unknown
General None Reported / Taken
Airport
Taxiway signs are difficult to impossible to read in West and Northwest portion of RJTT airport with tall un-mowed grass obscuring them.
Air carrier Captain reported taxiway signs obscured due to overgrown grass/weeds at RJTT airport.