I would assume the most famous symbol of Japan would be the mountain - Fuji. It features prominently in many a ways in our culture (for example, the Atari logo). As for technologies, the most widely known might be Tokyo Tower, it's television broadcasting tower.
Also, the game of Go is rather widely recognized.
The symbol of Shinto
I believe you are refering to the number four. In japan this is associated with death and you will find things are rarely sold in fours
Japan.
Courage
Wisdom.
Good manners.
translate things correctly
The red sun of Japan -Tyson black,Conn Shearer
kiwiana is important to nz as they are items, events, people etc that are owned/inherited in nz and are things that we specialise in and they represent nz
Some important things of world war 2 were attack on Pearl Harbour, The Atom Bomb on Japan, The D day in Normandy, and Japan entering the war.
it stands for the sun
Japan
The red circle on the Japan flag represents the rising red sun