On occasion, menacing black vans with fluttering "Rising Sun" flags and Imperial chrysanthemum logos may screech militaristic propaganda around the Yasukuni Shrine and near the Nagatacho/Kasumigaseki areas. With xenophobic right-wing attitudes financed by the yakuza Japan's mafia and tacit police cooperation, foreigners may get baleful looks from the young sunglassed toughs running the show, but they are not a real danger unless actively provoked.
Smoking on the major streets and sidewalks are prohibited by law in Chiyoda Ward. Although generally not strictly enforced, if you get unlucky, fines go up to ¥20,000.