It is for attention. The whistles are very distinct and more effective than random yelling. Yelling would just be ignored as someone just making a scene.
The answer is no they are not armed!
One can find an airport in Japan by going on Expedia flight which offer flights to and from Japan. One can also contact the international Japanese airport for more information.
Tokyo Narita International Airport
Tokyo, Japan
Samurai warriors were the shogun's body guards.
Tokyo, Japan
Haneda Airport is the closest major airport to Yokohama and is essentially just on the outskirts of the city. Haneda primarily serves domestic flights within Japan. Narita International Airport is the closest airport for most international flights to and from Japan. Narita is a little over an hour travel time by car or train from Yokohama.
There are five first class international airports in the nation of Japan. The largest is Tokyo International Airport on the Island of Honshu.
There are many airports in Japan. The small airport at Sendai was destroyed but all others are still operating.
tokyio
6,409 miles Dallas-Fort Worth International Airport (DFW) to Narita International Airport
Narita Airport (Tokyo)Haneda Airport (Tokyo)Kansai Airport (Osaka)Central Japan Airport (Nagoya)Asahikawa AirportShin-Chitose Airport (Sapporo)Hakodate AirportAomori AirportAkita AirportSendai AirportFukushima AirportNiigata AirportToyama AirportKomatsu Airport (Kanazawa)Okayama AirportHiroshima AirportYonago AirportTakamatsu AirportKitakyushu AirportFukuoka AirportNagasaki AirportKumamoto AirportOita AirportMiyazaki AirportKagoshima AirportNaha Airport (Okinawa)