3909 Showcase Inc.ショーケースTSE Standard / Information & Communication
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Showcase Inc. stock plunged on Oct 30: what happened
It closed at ¥700 on Oct 30 (−¥127, −15.36%), ranking #8 among the top losers of all stocks on the Tokyo Stock Exchange.
No disclosures were found for this stock around that day. Share what you know in the posts below.
Changes are calculated from the closing prices this site collects daily; limit-up/down is an estimate based on the daily price limit. Please make your own investment decisions.
Showcase Inc. (3909) at a glance
Prices are from Yahoo! Finance and may be delayed. Always check the latest price before trading.
Showcase Inc. (3909) Stock Price History
Showcase Inc. closed at ¥700 on Oct 30, 2026, +239.8% over 1 month, +131.0% over 1 year.
If you had invested ¥100,000 1 month ago, it would be worth ¥339,806 today (+239.8%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved −5.2%, while this stock moved +239.8%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Oct 30 (Fri) | ¥700 | −127 | −15.36% |
| Oct 29 (Thu) | ¥827 | −103 | −11.08% |
| Oct 28 (Wed) | ¥930 | −173 | −15.68% |
| Oct 27 (Tue) | ¥1,103 | +150 | +15.74% |
| Oct 26 (Mon) | ¥953 | +150 | +18.68% |
| Oct 23 (Fri) | ¥803 | −72 | −8.23% |
| Oct 22 (Thu) | ¥875 | +150 | +20.69% |
| Oct 21 (Wed) | ¥725 | +100 | +16.00% |
| Oct 20 (Tue) | ¥625 | −150 | −19.35% |
| Oct 19 (Mon) | ¥775 | +100 | +14.81% |
If you had invested ¥100,000 3 months ago, it would be worth ¥344,828 today (+244.8%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +2.3%, while this stock moved +244.8%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Oct 30 (Fri) | ¥700 | −127 | −15.36% |
| Oct 29 (Thu) | ¥827 | −103 | −11.08% |
| Oct 28 (Wed) | ¥930 | −173 | −15.68% |
| Oct 27 (Tue) | ¥1,103 | +150 | +15.74% |
| Oct 26 (Mon) | ¥953 | +150 | +18.68% |
| Oct 23 (Fri) | ¥803 | −72 | −8.23% |
| Oct 22 (Thu) | ¥875 | +150 | +20.69% |
| Oct 21 (Wed) | ¥725 | +100 | +16.00% |
| Oct 20 (Tue) | ¥625 | −150 | −19.35% |
| Oct 19 (Mon) | ¥775 | +100 | +14.81% |
If you had invested ¥100,000 6 months ago, it would be worth ¥307,018 today (+207.0%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +6.8%, while this stock moved +207.0%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Oct 2026 | ¥700 | +239.8% |
| Sep 2026 | ¥206 | +6.7% |
| Aug 2026 | ¥193 | −5.9% |
| Jul 2026 | ¥205 | +9.0% |
| Jun 2026 | ¥188 | −12.1% |
| May 2026 | ¥214 | −6.1% |
| Apr 2026 | ¥228 | −3.0% |
If you had invested ¥100,000 1 year ago, it would be worth ¥231,023 today (+131.0%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +23.3%, while this stock moved +131.0%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Oct 2026 | ¥700 | +239.8% |
| Sep 2026 | ¥206 | +6.7% |
| Aug 2026 | ¥193 | −5.9% |
| Jul 2026 | ¥205 | +9.0% |
| Jun 2026 | ¥188 | −12.1% |
| May 2026 | ¥214 | −6.1% |
| Apr 2026 | ¥228 | −3.0% |
| Mar 2026 | ¥235 | −9.6% |
| Feb 2026 | ¥260 | −11.6% |
| Jan 2026 | ¥294 | +6.1% |
| Dec 2025 | ¥277 | −12.6% |
| Nov 2025 | ¥317 | +2.6% |
| Oct 2025 | ¥309 | ― |
If you had invested ¥100,000 3 years ago, it would be worth ¥236,486 today (+136.5%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +98.1%, while this stock moved +136.5%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | ¥700 | +152.7% |
| 2025 | ¥277 | ― |
If you had invested ¥100,000 5 years ago, it would be worth ¥119,863 today (+19.9%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +113.7%, while this stock moved +19.9%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | ¥700 | +152.7% |
| 2025 | ¥277 | ― |
If you had invested ¥100,000 in Apr 2015, it would be worth ¥35,990 today (−64.0%).Price change only; dividends and fees are not included.
Over the same period the Nikkei 225 moved +212.8%, while this stock moved −64.0%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | ¥700 | +152.7% |
| 2025 | ¥277 | −7.7% |
| 2024 | ¥300 | −2.0% |
| 2023 | ¥306 | −1.9% |
| 2022 | ¥312 | −36.1% |
| 2021 | ¥488 | −51.6% |
| 2020 | ¥1,009 | +41.5% |
| 2019 | ¥713 | +14.8% |
| 2018 | ¥621 | −58.5% |
| 2017 | ¥1,498 | +23.6% |
| 2016 | ¥1,212 | +48.3% |
| 2015 | ¥818 | ― |
Daily, weekly and monthly closes (Yahoo! Finance, split-adjusted, dividends excluded). "All" covers the range Yahoo provides (from Apr 2015). Please check the latest prices before trading.
Showcase Inc. (3909) financial indicators
PER, ROE and dividend yield are based on company forecasts, calculated from earnings reports and the closing price after each trading day.
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