Book of Torii 100K slot: RTP and max win
Book of Torii 100K is a high-volatility slot by Miyake Studios on Stake Engine, released 31 Oct 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% of them. The top payout is 100,000× the bet, bigger than 100% of Engine slots; from a base spin it lands about once every 5,000,000 spins. It has 5 bonus buys priced at 100× to 300× the bet; the best returns 96.70%, so each buy costs 3.30× the bet on average over the long run. It is the No. 3182 most played Engine slot over the last 30 days.
Every mode, side by side
Costs are multiples of the base bet. Odds come from the published outcome table for v1. "Returns the cost" counts rounds that pay back at least what the mode cost. Expected cost is cost × (1 − RTP): the average amount lost per round over the long run.
| Mode | Type | Cost | RTP | Max win | Max win odds | Pays anything | Returns the cost | Expected cost per round | |
|---|---|---|---|---|---|---|---|---|---|
| Base | Base spin | 1.00× | 96.70% | 100,000× | 1 in 5,000,000 | 1 in 2.59 | 1 in 4.88 | 0.03× base | Simulate |
| Enhanced | Boosted spin | 2.00× | 96.70% | 100,000× | 1 in 2,500,000 | 1 in 2.53 | 1 in 4.58 | 0.07× base | Simulate |
| Bonus Boost | Boosted spin | 5.00× | 96.70% | 100,000× | 1 in 1,000,000 | 1 in 1.39 | 1 in 8.49 | 0.17× base | Simulate |
| Kami Blessing | Boosted spin | 15× | 96.70% | 5,000× | 1 in 50,000 | – | 1 in 7.91 | 0.50× base | Simulate |
| Free Spins | Bonus buy | 100× | 96.70% | 100,000× | 1 in 2,500 | – | 1 in 7.91 | 3.30× base | Simulate |
| Fuji Free Spins | Bonus buy | 200× | 96.70% | 100,000× | 1 in 5,000 | – | 1 in 11 | 6.60× base | Simulate |
| Torii Gates | Bonus buy | 250× | 96.70% | 100,000× | 1 in 4,167 | – | 1 in 4.49 | 8.25× base | Simulate |
| Mystery Bonus | Bonus buy | 300× | 96.70% | 100,000× | 1 in 2,623 | every round | 1 in 6.27 | 9.90× base | Simulate |
| Super Free Spins | Bonus buy | 300× | 96.70% | 100,000× | 1 in 2,500 | every round | 1 in 6.03 | 9.90× base | Simulate |
Work out the cost of Book of Torii 100K bonus buys at your bet size
Version history
Base-mode RTP per published math version. Older versions stay public in the fairness API, so changes can be checked.
| Version | Base RTP | |
|---|---|---|
| v1 | 96.700% | Active |
Frequently asked
What is the RTP of Book of Torii 100K?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 1. All 5 of its bonus buys return 96.70%.
What is the max win in Book of Torii 100K and how likely is it?
The top payout is 100,000× the base bet. On a base spin it lands 1 in 5,000,000 spins. In the Free Spins buy (100×) 100,000× lands 1 in 2,500 buys.
Does Book of Torii 100K have a bonus buy, and what does it cost?
Yes, 5 buy modes. Free Spins: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Fuji Free Spins: 200× the base bet, 96.70% RTP, an expected cost of 6.60× the base bet per buy. Torii Gates: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Mystery Bonus: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy. Super Free Spins: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy.
Is Book of Torii 100K high or low volatility?
High. Its base-mode standard deviation is 48.9× the bet, which puts it in the highest third of Engine games. What volatility means.
Can I check that a result was fair?
Yes. Engine games use provably fair seeds. Once your server seed is revealed you can replay any round against the published outcome table. See how to verify a result.
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