Major shareholder of Optimus Group Company Limited
Other assets (est.): the sum of each year's after-tax income (pay + dividends in own name − estimated taxes and social insurance) dividends retained by asset-management companies (less about 20% corporate tax), and proceeds from share sales (the drop in shares from the previous year × share price, less 20.315% tax, or about 30% for asset-management companies), for the years we have data. Spending, real estate, donations and savings from earlier years are not reflected.
| Company | Held by | Shares | Stake | Price | Value | Dividends |
|---|---|---|---|---|---|---|
| Optimus Group Company Limited 9268 · FY ending Mar 2026 |
Own name | 2,287,200 | 3.34% | ¥1,092 | ¥2.5B | ¥41.2M |
| The Zenitaka Corporation 1811 · FY ending Mar 2026 |
Own name | 151,000 | 2.11% | ¥8,257 | ¥1.2B | ¥18.1M |
| Nippi,Incorporated 7932 · FY ending Mar 2026 |
Own name | 85,000 | 3.04% | ¥12,120 | ¥1.0B | ¥59.2M |
| Parker Corporation 9845 · FY ending Mar 2026 |
Own name | 635,000 | 2.50% | ¥1,386 | ¥880M | ¥33.7M |
| Seikagaku Corporation 4548 · FY ending Mar 2026 |
Own name | 1,141,000 | 2.09% | ¥729 | ¥831M | ¥34.2M |
| NISSHIN GROUP HOLDINGS Co., Ltd. 8881 · FY ending Mar 2026 |
Own name | 1,158,600 | 2.47% | ¥706 | ¥818M | ¥40.6M |
| GREE Holdings, Inc. 3632 · FY ending Jun 2026 |
Own name | 1,851,000 | 1.03% | ¥376 | ¥696M | ¥40.7M |
| Musashi Co.,Ltd. 7521 · FY ending Mar 2026 |
Own name | 228,000 | 3.35% | ¥2,715 | ¥619M | ¥17.3M |
| Sanyo Engineering & Construction Inc. 1960 · FY ending Mar 2026 |
Own name | 463,000 | 3.02% | ¥1,315 | ¥609M | ¥30.1M |
| First Juken Co.,Ltd. 8917 · FY ending Oct 2025 |
Own name | 506,000 | 3.64% | ¥1,114 | ¥564M | ¥21.8M |
| 株式会社デジタルホールディングス 2389 · FY ending Dec 2024 |
Own name | 452,000 | 2.58% | ¥1,217 | ¥550M | ¥29.4M |
| Ku Holdings Co.,Ltd. 9856 · FY ending Mar 2026 |
Own name | 459,000 | 1.47% | ¥1,176 | ¥540M | ¥26.6M |
| Yoshicon Co.,Ltd 5280 · FY ending Mar 2026 |
Own name | 186,000 | 2.67% | ¥2,379 | ¥442M | ¥15.8M |
| Kawagishi Bridge Works Co.,Ltd. 5921 · FY ending Sep 2025 |
Own name | 89,000 | 3.28% | ¥4,585 | ¥408M | ¥14.2M |
| Watanabe Sato Co., Ltd. 1807 · FY ending Mar 2026 |
Own name | 190,000 | 3.05% | ¥1,996 | ¥379M | ¥15.2M |
| IR Japan Holdings, Ltd. 6035 · FY ending Mar 2026 |
Own name | 521,900 | 2.93% | ¥703 | ¥367M | ¥14.6M |
| Wesco Holdings Inc. 6091 · FY ending Jul 2026 |
Own name | 383,000 | 2.95% | ¥869 | ¥333M | ¥11.5M |
| Imagineer Co.,Ltd. 4644 · FY ending Mar 2026 |
Own name | 319,000 | 3.30% | ¥1,014 | ¥324M | ¥19.1M |
| Biken Techno Corporation 9791 · FY ending Mar 2026 |
Own name | 231,000 | 3.06% | ¥1,400 | ¥323M | ¥8.3M |
| Mikikogyo Co.,Ltd. 1718 · FY ending Dec 2025 |
Own name | 34,200 | 3.12% | ¥8,614 | ¥295M | ¥12.0M |
| Endo Manufacturing Co.,Ltd. 7841 · FY ending Dec 2025 |
Own name | 246,000 | 2.80% | ¥1,184 | ¥291M | ¥9.8M |
| WILLPLUS Holdings Corporation 3538 · FY ending Jun 2026 |
Own name | 309,500 | 3.16% | ¥890 | ¥275M | ¥14.2M |
| Applied Co., Ltd. 3020 · FY ending Mar 2026 |
Own name | 67,200 | 2.49% | ¥3,777 | ¥254M | ¥8.7M |
| KOMAIHALTEC Inc. 5915 · FY ending Mar 2026 |
Own name | 130,300 | 2.80% | ¥1,942 | ¥253M | ¥9.1M |
| Zenken Corporation 7371 · FY ending Jun 2026 |
Own name | 333,152 | 2.73% | ¥705 | ¥235M | ¥9.0M |
| Nichiwa Sangyo Co., Ltd. 2055 · FY ending Mar 2026 |
Own name | 601,000 | 3.32% | ¥384 | ¥231M | ¥3.6M |
| First Brothers Co., Ltd. 3454 · FY ending Nov 2025 |
Own name | 196,200 | 1.40% | ¥1,169 | ¥229M | ¥6.9M |
| Tanaka Co.,Ltd 7619 · FY ending Mar 2026 |
Own name | 260,000 | 3.20% | ¥853 | ¥222M | ¥8.1M |
| i.a groupcorporation 7509 · FY ending Mar 2026 |
Own name | 48,700 | 3.30% | ¥4,468 | ¥218M | ¥7.3M |
| TAKADAKIKO(Steel Construction)CO.,LTD. 5923 · FY ending Mar 2026 |
Own name | 200,000 | 3.43% | ¥1,022 | ¥204M | ¥10.0M |
| Fuji Seiko Limited 6142 · FY ending Feb 2026 |
Own name | 129,000 | 4.04% | ¥1,547 | ¥200M | ¥1.9M |
| 株式会社アイ・オー・データ機器 6916 · FY ending Jun 2021 |
Own name | 187,000 | 1.45% | ¥1,030 | ¥193M | ¥4.7M |
| Denkyo Group Holdings Co.,Ltd. 8144 · FY ending Mar 2026 |
Own name | 140,000 | 2.23% | ¥1,337 | ¥187M | ¥6.0M |
| HONYAKU Center Inc. 2483 · FY ending Mar 2026 |
Own name | 100,000 | 2.97% | ¥1,805 | ¥180M | ¥14.0M |
| Justplanning Inc. 4287 · FY ending Jan 2026 |
Own name | 365,200 | 3.12% | ¥469 | ¥171M | ¥4.0M |
| Kobayashi Yoko Co.,Ltd. 8742 · FY ending Mar 2026 |
Own name | 353,000 | 2.95% | ¥455 | ¥161M | ¥2.1M |
| Takamisawa Co., Ltd. 5283 · FY ending Jun 2026 |
Own name | 52,000 | 3.18% | ¥2,908 | ¥151M | ¥3.6M |
| 株式会社メルディアDC 1739 · FY ending Jun 2023 |
Own name | 193,300 | 3.18% | ¥780 | ¥151M | ¥3.3M |
| C.S. Lumber Co., Inc 7808 · FY ending May 2026 |
Own name | 55,200 | 2.99% | ¥2,660 | ¥147M | ¥4.4M |
| 株式会社イボキン 5699 · FY ending Dec 2025 |
Own name | 101,000 | 3.09% | ¥1,413 | ¥143M | ¥3.2M |
| The Kosei Securities Co.,Ltd 8617 · FY ending Mar 2026 |
Own name | 281,000 | 2.98% | ¥504 | ¥142M | ¥2.8M |
| Apple Internationalco.,Ltd. 2788 · FY ending Dec 2025 |
Own name | 414,800 | 3.20% | ¥337 | ¥140M | ¥4.1M |
| Gendai Agency Inc. 2411 · FY ending Mar 2026 |
Own name | 286,300 | 2.60% | ¥460 | ¥132M | ¥6.9M |
| Taiyo Kisokogyo Co.,Ltd. 1758 · FY ending Jan 2026 |
Own name | 51,000 | 2.57% | ¥2,554 | ¥130M | ¥3.1M |
| Shinden Hightex Corporation 3131 · FY ending Mar 2026 |
Own name | 48,300 | 2.56% | ¥2,614 | ¥126M | ¥6.3M |
| Maruhachi Holdings Co., Ltd. 3504 · FY ending Mar 2026 |
Own name | 111,000 | 0.72% | ¥1,124 | ¥125M | ¥5.5M |
| IID, Inc. 6038 · FY ending Jun 2026 |
Own name | 150,000 | 3.05% | ¥801 | ¥120M | ¥3.5M |
| 株式会社ファミリー 8298 · FY ending Mar 2021 |
Own name | 191,000 | 3.42% | ¥611 | ¥117M | ¥1.9M |
| Asmo Corporation 2654 · FY ending Mar 2026 |
Own name | 292,000 | 2.17% | ¥397 | ¥116M | ¥2.9M |
| Harima-Kyowa Co.,LTD. 7444 · FY ending Mar 2026 |
Own name | 58,000 | 1.08% | ¥1,996 | ¥116M | ¥3.5M |
| ヤマシタヘルスケアホールディングス株式会社 9265 · FY ending May 2026 |
Own name | 37,100 | 1.46% | ¥3,077 | ¥114M | ¥4.0M |
| 株式会社クレステック 7812 · FY ending Jun 2026 |
Own name | 53,100 | 1.75% | ¥2,137 | ¥113M | ¥5.5M |
| 株式会社一六堂 3366 · FY ending Feb 2018 |
Own name | 188,700 | 1.95% | ¥459 | ¥86.6M | ¥1.9M |
| Medical Net , Inc. 3645 · FY ending May 2026 |
Own name | 322,400 | 3.48% | ¥265 | ¥85.4M | ¥967,200 |
| Chuokeizai-Sha Holdings,Inc. 9476 · FY ending Sep 2025 |
Own name | 116,000 | 2.65% | ¥716 | ¥83.0M | ¥1.5M |
| Ykt Corporation 2693 · FY ending Dec 2025 |
Own name | 354,000 | 3.06% | ¥228 | ¥80.7M | ¥1.8M |
| EARLY AGE CO., Ltd. 3248 · FY ending Oct 2025 |
Own name | 94,700 | 2.98% | ¥837 | ¥79.2M | ¥3.4M |
| Moriya Corporation 1798 · FY ending Mar 2026 |
Own name | 65,000 | 2.98% | ¥1,196 | ¥77.7M | ¥11.7M |
| Saita Corporation 1999 · FY ending Jun 2026 |
Own name | 19,000 | 3.12% | ¥4,057 | ¥77.1M | ¥1.3M |
| Zoa Corporation 3375 · FY ending Mar 2026 |
Own name | 43,000 | 3.42% | ¥1,778 | ¥76.5M | ¥3.2M |
| Nansin Co., Ltd. 7399 · FY ending Mar 2026 |
Own name | 130,000 | 1.96% | ¥585 | ¥76.0M | ¥2.6M |
| 株式会社インテリックス 8940 · FY ending May 2025 |
Own name | 71,626 | 0.88% | ¥888 | ¥63.6M | ¥3.3M |
| Innovation Inc. 3970 · FY ending Mar 2026 |
Own name | 55,500 | 2.01% | ¥1,120 | ¥62.2M | ¥2.2M |
| INTELLEX HOLDINGS Co.,Ltd. 463A · FY ending May 2026 |
Own name | 67,500 | 0.68% | ¥904 | ¥61.1M | ¥1.6M |
| Jss Corporation 6074 · FY ending Mar 2026 |
Own name | 120,000 | 2.98% | ¥508 | ¥60.9M | ¥2.4M |
| Nittoh Corporation 1738 · FY ending Mar 2026 |
Own name | 87,000 | 2.16% | ¥613 | ¥53.4M | ¥1.6M |
| 株式会社ボルテージ 3639 · FY ending Jun 2026 |
Own name | 189,300 | 2.91% | ¥264 | ¥49.9M | — |
| Sonocom Co.,Ltd. 7902 · FY ending Mar 2026 |
Own name | 46,000 | 1.26% | ¥1,057 | ¥48.6M | ¥598,000 |
| NIHON ISK Company, Limited 7986 · FY ending Dec 2025 |
Own name | 26,000 | 1.70% | ¥1,792 | ¥46.6M | ¥780,000 |
| Casa Inc. 7196 · FY ending Jan 2026 |
Own name | 58,900 | 0.65% | ¥713 | ¥42.0M | ¥883,500 |
| TAC株式会社 4319 · FY ending Mar 2025 |
Own name | 203,400 | 1.12% | ¥204 | ¥41.4M | ¥813,600 |
| Truck-One Co., Ltd. 3047 · FY ending Dec 2025 |
Own name | 72,200 | 3.01% | ¥505 | ¥36.4M | ¥794,200 |
| Global-Dining,Inc. 7625 · FY ending Dec 2025 |
Own name | 81,000 | 0.78% | ¥405 | ¥32.8M | ¥405,000 |
| 株式会社ザッパラス 3770 · FY ending Apr 2025 |
Own name | 75,900 | 0.85% | ¥404 | ¥30.7M | ¥379,500 |
| Kowa Co.,Ltd. 7807 · FY ending Feb 2026 |
Own name | 31,000 | 0.76% | ¥855 | ¥26.5M | ¥403,000 |
| 株式会社トラスト 3347 · FY ending Mar 2025 |
Own name | 85,400 | 0.33% | ¥287 | ¥24.5M | ¥512,400 |
| Kitalive Inc. 5039 · FY ending Dec 2025 |
Own name | 12,600 | 1.00% | ¥1,450 | ¥18.3M | — |
| Laxus Technologies Inc. 288A · FY ending Mar 2026 |
Own name | 144,500 | 0.56% | ¥117 | ¥16.9M | — |
| WellcoHoldings Corporation 7831 · FY ending Oct 2025 |
Own name | 321,000 | 2.06% | — | — | ¥642,000 |
| Year | Net worth | Listed shares | Pay | Dividends | Total income | Taxes (est.) | After tax (est.) | Share sales (after tax) |
|---|---|---|---|---|---|---|---|---|
| 2026partial | ¥22.8B | ¥19.7B | — | ¥606M | ¥606M | ¥123M | ¥483M | ¥399M |
| 2025partial | ¥15.5B | ¥13.3B | — | ¥477M | ¥477M | ¥96.9M | ¥380M | ¥116M |
| 2024partial | ¥10.6B | ¥8.9B | — | ¥294M | ¥294M | ¥59.7M | ¥234M | ¥197M |
| 2023 | ¥7.3B | ¥6.0B | — | ¥213M | ¥213M | ¥43.4M | ¥170M | ¥148M |
| 2022partial | ¥5.2B | ¥4.2B | — | ¥121M | ¥121M | ¥24.6M | ¥96.4M | ¥5.3M |
| 2021 | ¥4.7B | ¥3.9B | — | ¥104M | ¥104M | ¥21.1M | ¥82.9M | ¥25.2M |
| 2020 | ¥3.3B | ¥2.5B | — | ¥77.6M | ¥77.6M | ¥15.8M | ¥61.9M | ¥120M |
| 2019partial | ¥3.1B | ¥2.5B | — | ¥63.4M | ¥63.4M | ¥12.9M | ¥50.5M | ¥25.4M |
| 2018 | ¥2.3B | ¥1.8B | — | ¥38.8M | ¥38.8M | ¥7.9M | ¥30.9M | ¥148M |
| 2017 | ¥1.8B | ¥1.5B | — | ¥28.7M | ¥28.7M | ¥5.0M | ¥23.6M | ¥302M |
| 2016 | ¥587M | ¥579M | — | ¥9.3M | ¥9.3M | ¥1.9M | ¥7.4M | — |
"Partial" years carry forward the previous year's value for companies that have not yet filed that year's annual report (such as December year-end companies). Pay and dividends cover only companies that have filed.
Net worth for each year is listed shares plus the other assets (est.) accumulated up to that year. Grouped by the calendar year of each company's fiscal year-end. Years in which the person was not among the top 10 shareholders of a company exclude that company.
Estate ¥23.3B = listed shares in own name ¥20.2B + other assets (est.) ¥3.1B
Total inheritance tax paid: ¥6.3B (27.0% of the estate).
| Heir | Inherits | Tax | After tax |
|---|---|---|---|
| Spouse | ¥11.7B | ¥0 | ¥11.7B |
| Each child | ¥5.8B | ¥3.1B | ¥2.7B |
Japanese inheritance tax, assuming the estate is split in statutory shares. A spouse pays no tax up to ¥160M or the statutory share, whichever is larger. Family size is not in the securities reports, so you can choose it (with no children, parents or siblings also become heirs, so the real figure differs). Business-succession deferrals, lifetime gifts, donations to foundations, debts and other reliefs are not reflected.