AKITSORA GAMING

Yukimi Onsen

Snow on warm water. A monkey leaps. The pools meet in Gokuraku.

Yukimi Onsen spins 3 independent 3×3 hot-spring pools. Snow Monkey Wilds hop for no-stake spins; 3 Springs open 10 Yumeguri spins with retained monkeys. Full pools and Gokuraku multiply the awards.

Demo play uses virtual credits with no monetary value.

RTP
96.89%
Volatility
Medium4.04
Max win
1,500× bet

In-game screens

Captured straight from the running game — real boards, real wins.

Yukimi Onsen — Three pools, one spin
Three pools, one spin3 pools of 3×3 spin together, each with 5 lines; the total bet is split evenly between them.
Yukimi Onsen — Monkey hop
Monkey hopA snow monkey leaps into the next pool to the right within the same round, at no extra stake, and scores there as a Wild.
Yukimi Onsen — Full pool
Full poolWhen all 9 cells in a pool show the same regular symbol, that pool's win for the spin pays ×10.
Yukimi Onsen — Yumeguri
Yumeguri3 Springs open 10 Yumeguri spins; monkeys stay in the pools and each one raises the multiplier for all three.
Yukimi Onsen — Big win
Big winThe paid spin, hops and Yumeguri together are capped at 1,500× the bet per round.
Yukimi Onsen — In-game paytable
In-game paytableThe RGS supplies each pool's lines and symbol pays; this page reads the same game definition.

Specification

Type3 pools of 3×3; 5 fixed lines per pool (15 in total)
Return to player (RTP)96.89%
VolatilityMedium (4.04)
Hit rate38.00%
Rounds winning ≥ 1× bet30.13%
Max win per round1,500× bet
Yumeguri free spins frequency≈ 1 in 117.22 rounds
Exact solution and cap boundsFinite-state calculations include early settlement at the three-full-pool cap. Other cap losses and numerical precision are checked with conservative bounds. The calculated RTP is 96.8900%; the public two-decimal disclosure is 96.89%. Independent implementation and record parity are separate cross-checks, not a claim of zero error.

Game math specifications and the paytable are read at build time from the definitions shared with the server code. See Math version for the configuration shown; confirm any other version or operator-specific settings separately.

How wins work

  • Each of the 3 independent pools has 3×3 cells, for 27 cells in total. Each pool evaluates its own 5 fixed lines; lines do not cross between pools.
  • Match 3 regular symbols on a line within a pool. Snow Monkey Wilds substitute for regular symbols, not Springs. Winning lines across all pools are added. Symbols do not tumble after a win.
  • Total bet is split into 3 equal shares. The paytable already shows total-bet multiples. Apply the eligible full-pool, Yumeguri and Gokuraku multipliers and add the result to this round's win.
  • Landing 3 Springs on the same base or hop spin starts 10 Yumeguri free spins. Free play does not retrigger. A multiplier alone does not pay an award without a winning line.

Paytable

Values are total-bet multiples for one line. Total bet is shared equally across 3 pools, each receiving 1/3; the table already converts to total bet, so do not divide by the pool count again. Add winning lines, then apply each eligible full-pool multiplier. Yumeguri and Gokuraku multiply the current spin's line awards. Spring symbols have no separate symbol award. Combined awards remain subject to the round cap.

Symbol3 matching cells within one pool
YuzuHigh-pay 0.5
Onsen eggHigh-pay 0.4
Wooden bucketHigh-pay 0.3
Folded towelHigh-pay 0.24
Yunohana mineralsLow-pay 0.16
Bamboo channelLow-pay 0.12
SnowballLow-pay 0.09
Maple leafLow-pay 0.06

Special symbols

Snow Monkey — Wild

Substitutes for regular symbols, not Springs, and has no separate symbol award. It hops right in base play and cycles during Yumeguri. Retained monkeys determine the feature multiplier.

Spring — Yumeguri entry

3 on one base or hop spin open Yumeguri. Springs have no separate symbol award and do not add or retrigger free spins during the feature.

Features

Monkey hops — no-stake spins

A new base-game monkey lands in the leftmost pool as a Wild. It hops right for up to 2 additional no-stake spins. After its rightmost-pool landing is scored, the hop sequence ends. Monkeys do not carry into another paid round.

Yumeguri — monkeys stay

3 Springs award 10 free spins. Existing monkeys enter with the feature, then cycle between pools without leaving. Collect up to 3 monkeys; each adds 1 to the shared pool multiplier, up to ×4.

Full pool

Fill all 9 cells in a pool with the same regular symbol to multiply that pool's awards by ×10. A Monkey Wild or Spring in the pool prevents an identical-symbol full pool.

Gokuraku — every pool full

When all 3 pools are full on the same spin, the spin's combined awards receive another ×20. Full-pool and Yumeguri multipliers combine with this award, subject to the 1,500× total-bet round cap.

Water, snow and the monkey family

Pool currents, stop impacts, line trails and jumping splashes follow actual outcomes. Yumeguri brings moonlit mountains. Big wins bring water rings, warm currents, snowfall and a jumping monkey family. Reduced motion preserves readable state and win information.

Settlement and reconnect

The paid spin, hops and Yumeguri belong to the same round: one stake, followed by settlement. Reconnecting restores the server-recorded board, monkeys and remaining spins. Reaching 1,500× total bet settles immediately without unused spins. This game has no bonus buy.

Technical

Game codeaki_onsen
Math versionyu1
TechnologyHTML5, no plug-in; one client for desktop and mobile
ViewportLandscape with proportional scaling
In-game languageTraditional Chinese (additional languages on request)
CurrenciesTWD (others can be registered on request)
IntegrationTransfer wallet (Operator API v3), launch-token redirect

Sources & verification scope

This product specification is written and maintained by its developer, Akitsora Gaming (AKI電子 in Taiwan). Measurement methods and sample information for RTP, volatility and hit rate appear in the specification table. Sampled results have uncertainty; RTP describes long-run return, not an individual player or session outcome.

Internal simulations and tests are not independent certification. We do not currently hold GLI or BMM certification reports. Supply to a market requiring third-party certification depends on completing its requirements.

See slot game development and supply for integration and supply scope, About us for development and content responsibility, or contact us for a math summary, version confirmation or a correction to this page.

The story

Fiction and adapted settings written by Akitsora Gaming for this title, including invented dialogue and events. This is not a historical or folklore reference. The rules and specification tables define the gameplay and math.

Falling snow quiets every sound across the mountain valley.
Only the steaming surface of the spring remembers each leap.

I. The Mountain Hot-Spring Inn

Beyond a silent forest of snow-laden cedars lies a secluded hot-spring inn glowing softly with wooden lanterns along the mountain ridge. Warm amber light spills across the frosted stones along the bank, while floating yuzu citrus and mineral-rich yunohana fill the crisp winter air with the soothing scent of mountain steam, welcoming weary travelers into the valley’s quiet, snow-draped embrace.

Set into the snowy courtyard are three independent open-air baths—the fragrant Cypress Bath, the rugged Rock Bath, and the shimmering Golden Bath. Each steaming pool turns its own three-by-three grid of cedar buckets, sake flasks, sweet steamed buns, and winter yuzu, evaluating its own fixed paylines while sharing the same tranquil snowfall beneath the high alpine peaks. Outside the timber bathhouse, crisp highland air meets the mineral-rich glow of the outdoor spring in a timeless winter retreat.

II. Leaping Monkeys Across Pools

Along the snowy stone rim sits a family of red-faced Snow Monkeys watching the rising mist with bright, curious eyes as flakes settle on their shoulders. Whenever a new monkey plunges into the leftmost Cypress Bath, ripples of golden water spread across the tiles as it becomes a Snow Monkey Wild, standing in for regular bathhouse treasures to complete a winning line.

Yet a playful mountain monkey never lingers in just one bath for long. Once the pool’s lines are tallied, it shakes the snow from its thick fur and bounds rightward into the next steaming bath, granting a no-stake hop spin as it travels from pool to pool across the courtyard until its final splash is scored at the far right.

III. Gushing Springs and Yumeguri

When three bubbling Spring scatters surface across the baths on the same base or hop spin, twilight gives way to silver moonlight over the snowy peaks and the Yumeguri bath-tour feature begins. Monkeys already soaking on the board enter the feature together, cycling happily from bath to bath without ever leaving the warm water until the moonlit tour concludes. Warm cedar steam curls past paper lanterns and snow-dusted bamboo eaves while the mountain brook murmurs softly below the veranda.

Every additional monkey that joins the soak during the feature raises the shared Yumeguri multiplier applied to winning lines across all three pools at once. With steaming white towels balanced neatly on their heads, the growing troop of soaking monkeys turns every moonlit splash into a warmer, richer celebration across the quiet mountain courtyard of the inn. Outside the timber bathhouse, crisp highland air meets the mineral-rich glow of the outdoor spring in a timeless winter retreat.

IV. Full Pools and Gokuraku Bliss

Every so often, the warm currents align so that a single bath’s entire nine-cell grid fills from corner to corner with one matching regular emblem, achieving a Full Pool. The water glows with a unified golden hue and multiplies every line award in that bath at once, rewarding the quiet harmony of an undisturbed soak in the falling snow. Warm cedar steam curls past paper lanterns and snow-dusted bamboo eaves while the mountain brook murmurs softly below the veranda.

Should all three baths achieve a Full Pool on the very same spin, the mountain inn enters the supreme state of Gokuraku. Warm golden currents, drifting snowflakes, and the leaping monkey family unite across all three steaming pools in a joyous winter festival that crowns the mountain night in steam, warmth, and shimmering light. Outside the timber bathhouse, crisp highland air meets the mineral-rich glow of the outdoor spring in a timeless winter retreat.

Want to spin Yukimi Onsen yourself?

The demo needs no account — click and spin. For integration docs, the math summary or sandbox access, send us an email.

Demo play uses virtual credits with no monetary value.