About SUSTEN
SUSTEN is a Technology company based in Minato (Japan) founded in 2019 by Dai Okano, Sho Nakamura, Masashi Yamaguchi, and Ryosuke Mashiko. Portfolio management for individuals is automated via smartphone platform. SUSTEN has raised $7.07 million across 2 funding rounds from investors including Japan post bank C, FIRSTLIGHT Capital and ASCENT. Its chief executive, as recorded, is Dai Okano. Its website susten.jp draws about 11 thousand monthly visits. Its focus areas include FinTech, Investment Tech, Wealth Management Platforms and Portfolio Management. Its competitors include Bloomo Investment, Wealth Wing and SUNWEALC; 1 of its 3 listed competitors has raised funding.
Company details
SUSTEN was founded in 2019 in Minato, Japan, as a fintech platform focused on investment services. Asset management is automated for individual users through a smartphone-based system, enabling global diversified portfolios aligned with personal investment goals. Operations are supported by algorithms derived from contemporary investment theories, allowing deposits to be managed without manual intervention. The service targets retail investors seeking efficient, theory-based asset allocation.
- Headquarters Minato, Japan
- Founders Dai Okano, Sho Nakamura, Masashi Yamaguchi, Ryosuke Mashiko
- SectorsTechnology
- Phone•••• ••••
- Website susten.jp
- Total Equity Funding$7.07M (USD)
in 2 rounds
- Latest Funding Round$6.33M (USD), Series A
Sep 2026
- InvestorsJapan post bank C
& 2 more
Funding Insights of SUSTEN
SUSTEN has successfully raised a total of $7.07M across 2 strategic funding rounds. The most recent funding activity was a Series A round of $6.33 million completed in September 2026. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $7.07M
- Total Rounds 2
- Last Round Series A — $6.33M
- First Round $737,606
(Jan 2020)
- Investors Count 3
All 2 funding rounds of SUSTEN with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Sep 2026 | $6.33M | Series A | – | – | |
| Jan 2020 | $737,606 | Seed | – | – | – |
3 investors in total: 3 institutional.
Investors in SUSTEN
SUSTEN has secured backing from 3 investors, including institutional and venture fund investors. Prominent investors backing the company include Japan post bank C, FIRSTLIGHT Capital and ASCENT.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
| firstlight-cap.com | ||||
| jp-bank.japanpost.jp | ||||
| theascent-group.com |
Investor details for SUSTEN
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of SUSTEN
4 people are tracked at SUSTEN (4 in leadership).
| Name | Role | Group |
|---|---|---|
Dai Okano | Co-Founder & CEO | Leadership |
Sho Nakamura | Co-Founder | Leadership |
Masashi Yamaguchi | Co-Founder | Leadership |
Ryosuke Mashiko | Co-Founder | Leadership |
Complete people profiles for SUSTEN
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of SUSTEN
3 dated milestones of SUSTEN across 7 years, from founding to its latest funding, stage changes and deals.
- Founded SUSTEN is founded.
- Funding First funding round of $738K.
- Funding Latest funding round, Series A, of $6.3M.
Competitors of SUSTEN
SUSTEN has 3 listed competitors in our database, 1 of them funded. They include Bloomo Investment, Wealth Wing and SUNWEALC.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| bloomo.co.jp | 2022 | Chuo, Japan | $19.34M | App-based platform for investment and portfolio management | ||
| wealth-wing.com | 2020 | Chiyoda, Japan | Provides an app-based platform for comprehensive wealth management solutions. | |||
| sunwealc.com | 2024 | Fukuoka, Japan | Serves as a community application focused on building and managing assets. |
Detailed competitors of SUSTEN
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
- Operating metrics
- Benchmarks
- Competitive positioning
Verified entity values are shown only after access is granted.
Web traffic of SUSTEN
The website of SUSTEN (susten.jp) receives about 11K visits a month.
- Monthly visits11K
▲ 30.2% vs previous month
Websites whose visitors overlap most with SUSTEN. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| folio-sec.com | 100% | 362K | #96,132 | View details | |
| rakuten-sec.co.jp | 97% | 94.2M | #325 | View details | |
| kabu.com | 92% | 3.2M | #24,731 | View details | |
| adviser-navi.co.jp | 89% | 298.3K | #145,835 | View details | |
crowdbank.jp | crowdbank.jp | 86% | #184,909 | – | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 29 similar websites and full traffic analytics for SUSTEN
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 29 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
Verified entity values are shown only after access is granted.
Unlock complete access to The Company Check
Get unrestricted viewing across everything we track — from companies and brands to investors, funding rounds, acquisitions, financials, and more.
- Unlimited viewing on all profiles Companies, investors, financials, funding, acquisitions & directors
- Full access to every database India & global coverage, advanced filters and rich profile details
- Always-on access from your team account Single premium plan for everything you see on the portal
Frequently Asked Questions about SUSTEN
SUSTEN was founded in 2019 and raised its 1st funding round 1 year after it was founded.
SUSTEN is headquartered in Minato, Japan. It is registered at Minato, Tokyo, Japan.
Dai Okano is the CEO of SUSTEN, as recorded in our data. They have also founded this company.
SUSTEN is a funded company, having raised a total of $7.07M across 2 funding rounds to date. The company's 1st funding round was a Seed of $737.61K, raised on Jan 2020.
SUSTEN was founded in 2019 in Minato, Japan, as a fintech platform focused on investment services. Asset management is automated for individual users through a smartphone-based system, enabling global diversified portfolios aligned with personal investment goals. Operations are supported by algorithms derived from contemporary investment theories, allowing deposits to be managed without manual intervention. The service targets retail investors seeking efficient, theory-based asset allocation.
SUSTEN's top competitors include Bloomo Investment, Wealth Wing and SUNWEALC.
SUSTEN has 3 investors. Key investors include Japan post bank C, FIRSTLIGHT Capital, and ASCENT.