Back then, when wallets didn't exists the Japanese needed a way to carry their money so, because of the hole in the middle of the coin, they were able to hold all their money on a string kind of like a bracelet.
The hole in Japanese coins, like the 5 yen coin, has both historical and practical reasons. Historically, it allowed people to string coins together for easy carrying. Practically, the hole reduces the amount of metal needed to make the coin, making it more cost-effective to produce.
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.
Both the Japanese yen and the Chinese yuan derive their name from the same Chinese character, which means "round" or "circle." This reflects the historical shape of coins used in East Asia.
In Japanese, the word for shrine is "jinja" (神社). Shrines are places of worship in Shinto, the indigenous religion of Japan, where people pray to kami (spirits or gods) for blessings, protection, and guidance. Shrines often feature distinctive gates called torii, sacred objects like amulets and charms, and rituals such as offering coins or clapping hands to get kami's attention.
The noun "coins" is a countable noun, specifically a plural countable noun.
Eyes in Japanese is "目" (me).
Not Japanese
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.
Not in modern times
The Japanese yen is the official currency of Japan. Some of the coins have holes in the middle and the paper currency looks similar to American currency with pictures of Japanese political figures on it.
The mint does not drill holes into the coins. If a hole is drilled into a coin it dramatically reduces value. MANY COUNTRIES DRILLED HOLES IN THEIR COINS. THE COINS WERE WORN FOR JEWELRY AND THAT RENDERS THE COIN PRETTY MUCH WORTHLESS.
To reduce their weight...
You can get Japanese coins if you travel to Japan, or if you visit a currency exchange, at an international airport or in a big city.
You do not provide any detail. If it is a general circulation coin, it is worth nothing. Modified coins are worthless. There were no British coins minted with holes in the centre. On the other hand, you may have a medallion of some sort.
Earth is a planet. Center's of galaxies sometimes contain black holes. Planets can't be black holes.
Center of the earth be there thank you
with a nail and hammer
Mostly the center of the galaxy.