Lack of land.
Japan is actually a rather small nation consisting of a group of small islands. They don't have a lot of land to bury people. They don't even have enough land to build houses, which is why every Japanese city is crammed with high-rise apartments.
Cremation is popular purely because there is no space to bury the dead.
Cremation
For some religions cremation is what they are told to do when they die, so a lot of people prefer it. I don't think it will ever be as popular as burials though.
sushi is popular in japan
Baseball is a very popular sport in Japan
Zen and Nichiren are both popular in Japan.
One of the reasons Japan is popular is for the sumo wrestling that they perform.
A lot of silk is produced in Japan, which is why silk worms are so popular there.
cremation prices
The most popular flower in Japan is the Sakura, which is the cherry blossom.
Yes, it is one of the most popular sports in Japan.
The most popular sedan in Japan is the Toyota Corolla.
There are many pieces of cremation jewellery which can be purchased. Pendants are a popular choice and can be purchased in many different styles. Bracelets are also available. Most come with funnels to fill the items.