A high roller bonus is an offer that casinos give to players who deposit large sums of money. This bonus is aimed at encouraging "high rollers" or customers who play for the big sums to continue making large deposits and placing higher stakes on games. High roller bonuses are mostly associated executive or VIP casinos.
When mentioning Japan, people often think about sushi and samurai, but the Japanese are also famous for being hardworking and humble. Most forms of gambling are banned in Japan, but online mobile gambling is growing fast in the country and it's easy to find attractive bonus offers targeting Japanese residents.