well, "Japanese coin" can be called "nihon no KOIN" (caps for katakana, lowercase for hiragana or kanji). However, the Japanese unit of currency involves coins which hold 5, 10, 50, 100, and 500 yen (en in Japanese) in value.
The Japanese coin that has a square hole in it is the 5 yen coin. The design of the coin includes a central cutout that is square-shaped. The 5 yen coin is made out of a lightweight metal and has a unique design compared to other Japanese coins.
yen
500
This coin is a Japanese 100 Yen coin featuring cherry blossoms. Minting began in 1967.
In Japanese it sounds like "go-en", which also has the same pronunciation as destiny.
It may be a Japanese 50 Yen coin minted since 1959. You might also try a library for a copy of the Standard Catalog of World Coins for pictures, values and lots more interesting info.
The Japanese 5 Yen coin is the second smallest coin in the Japanese currency. As at 24-Dec-2010, 5 yen could be exchanged for about - $0.06 AUD £0.04 GBP $0.06 USD
Many of the coins are valued in price close to $18 each, The amount will vary depending upon the condition of the coin.
100$ if you have a 1995 yi yuan Japanese coin
Japanese coins are in "yen" (unit of currency).The smaller denominations were the "sen" (1/100 yen) and "rin" (1/1000 yen).
a qua is actually a word... a qua is some sort of Japanese coin And There Is Quail or Quails
Penny is spelled "ペニー" in Japanese katakana. There is no uniquely Japanese word for the currency "penny."