JPX · 4388 · stock
AI,Inc. (4388) stock price history
Every JPX trading session of AI,Inc. from Jun 28, 2018 to Sep 28, 2026: 2,017 daily bars, adjusted for splits and dividends, with minute bars from Sep 14, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
4388 adjusted close, 2018 to 2026
- ¥3,984
- All time high, 2018
- ¥514.77
- 52 week high, ¥351.00 low
- 2,017
- Daily sessions since 2018
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2018 to 2026 series and minute bars.
4388 key facts
- AI,Inc. (4388) closed at ¥359.00 on Sep 28, 2026 on JPX.
- 4388's all time high close is ¥3,984, set on Jun 28, 2018; its all time low close is ¥353.00 on Jun 15, 2026.
- 4388's 52 week range is ¥351.00 to ¥514.77.
- 4388 returned -30.4% over the year to Sep 28, 2026 and -73.4% over five years.
- Since Jun 28, 2018 4388 returned -91%, -25.3% a year compounded.
- 4388's deepest drawdown was -91.1% from Jun 28, 2018 to Jun 15, 2026.
- DataCedar holds 2,017 daily sessions of 4388 history from Jun 28, 2018 and minute bars from Sep 14, 2026, adjusted for splits and dividends, served by the API under a key.
4388 price chart, 2018 to 2026
4388 returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -3.0% |
| 3 months | +0.6% |
| 6 months | -8.9% |
| Year to date | -13.4% |
| 1 year | -30.4% |
| 3 years | -61.5% |
| 5 years | -73.4% |
| 10 years | n/a |
| Since Jun 28, 2018 | -91.0% |
| Compound annual growth, 8.3 years | -25.3% |
4388 records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- ¥3,984 on Jun 28, 2018
- All time low close
- ¥353.00 on Jun 15, 2026
- 52 week high
- ¥514.77 on Nov 13, 2025
- 52 week low
- ¥351.00 on Jun 25, 2026
- Deepest drawdown
- -91.1% from Jun 28, 2018 to Jun 15, 2026, not yet recovered
- Best single session
- +75.8% on Mar 9, 2023
- Worst single session
- -17.1% on Jun 29, 2018
- Volatility, 1 year annualised
- 25.8%
- Sessions closing higher, 1 year
- 41%
- Best calendar year
- 2023, +22%
- Worst calendar year
- 2021, -63%
4388 price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 2018 starts on Jun 28, 2018; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | ¥419.74 | ¥452.41 | ¥351.00 | ¥359.00 | -13.4% | 2.2M | 178 |
| 2025 | ¥524.67 | ¥560.31 | ¥377.17 | ¥414.79 | -14.8% | 8.7M | 243 |
| 2024 | ¥726.62 | ¥1,035 | ¥450.43 | ¥487.06 | -33.6% | 13.4M | 245 |
| 2023 | ¥597.93 | ¥1,762 | ¥574.17 | ¥733.55 | +22.3% | 87.7M | 246 |
| 2022 | ¥847.07 | ¥1,058 | ¥573.18 | ¥599.91 | -28.3% | 5.9M | 244 |
| 2021 | ¥2,264 | ¥2,381 | ¥696.20 | ¥837.21 | -62.6% | 7.3M | 245 |
| 2020 | ¥1,793 | ¥3,938 | ¥867.36 | ¥2,239 | +21.0% | 28.5M | 242 |
| 2019 | ¥1,609 | ¥2,369 | ¥1,420 | ¥1,851 | +12.2% | 11.8M | 241 |
| 2018 | ¥3,401 | ¥4,072 | ¥1,566 | ¥1,649 | n/a | 20.5M | 133 |
4388 monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | ¥359.00 | -4.8% |
| August 2026 | ¥377.00 | +6.2% |
| July 2026 | ¥355.00 | -2.5% |
| June 2026 | ¥364.00 | -2.9% |
| May 2026 | ¥375.00 | -4.1% |
| April 2026 | ¥391.00 | -1.8% |
| March 2026 | ¥398.00 | -4.7% |
| February 2026 | ¥417.76 | -0.7% |
| January 2026 | ¥420.73 | +1.4% |
| December 2025 | ¥414.79 | -10.7% |
| November 2025 | ¥464.29 | -2.9% |
| October 2025 | ¥478.15 | -3.8% |
About the 4388 data
Daily bars. 2,017 sessions from Jun 28, 2018 to Sep 28, 2026, one row per JPX trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Sep 14, 2026 forward, most recent session Sep 29, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are JPX trading days; minute timestamps are UTC. Prices are in JPY. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Jun 28, 2018, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/4388/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on JPX
Common questions
4388 share price history
