In ordinary lotteries like this, if an individual or organization tries to manipulate the result, there is room for manipulation, and if anybody tries to manipulate, cases such as the examples can occur at any time. However, Tombola extracts a random number that cannot be manipulated at a fixed time through a random number drawing based on a blockchain, and save the number, time, and users wallet selected by each person participating in the game in the blockchain, which makes it possible to continuously develop to be more transparent and fairer than any other lottery services.