Here you can find real and simulated statistics for the Japanese Dream Jumbo Mini lottery.
The statistics are for prize numbers exceeding 1 million yen.

Dream Jumbo Mini is a special Japanese lottery. The draw takes place in spring. Each ticket has a pre-printed number and group, with 100 series of 99,999 numbers per unit (5 units). Each ticket costs 300 yen.

Statistics of real lotteries:

This is a table of values that appear in each digit of winning numbers in all drawings of the Dream Jumbo Mini lottery (historical of draws). Winning numbers are spread across multiple groups, with 80% appearing in more than one group per draw.
Low groups (0-30) dominate, accounting for 75% of valid draws, with the digit 0 in the first position in 64 out of 67 groups.
You can use this assessment to place bets with numbers that do not appear in the history.

You can reach the following conclusions:

Adjacent prizes (±1) offer an attractive probability, with 100 winning tickets per draw, doubling the chances compared to the 1st prize (1 in 494,995).

Digits 1, 2, and 4 are the most frequent in positions 2 to 6 of the number, with a 33% average appearance.

Guessing the group (0-99) is 10,000 times more likely than the exact 6-digit number, with a probability of 1 in 99.

With 5,000,000 tickets winning smaller prizes (300 yen), the odds of winning a prize are 1 in 10.

Statistics of simulated lotteries:

In simulations, 1st and 2nd place prizes (30M and 10M yen) have been hit with a frequency of 0.0004% per ticket.