# Etsuji Otsuka

> Etsuji Otsuka is a seed investor at TRUIM Partners (Tokyo) backing Apps and Software. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [TRUIM Partners](https://shizune.co/investors/profile/truim-partners)
- Location: Tokyo, Japan
- Total investments: 1
- Last investment: Mar 2013
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://jp.linkedin.com/in/etsuji-otsuka-ab939
- X (Twitter): https://twitter.com/etsuji
- Facebook: https://www.facebook.com/etsuji

Etsuji Otsuka is a seed investor at TRUIM Partners in Tokyo focused on Apps and Software. Etsuji Otsuka - Co-founder and CIO @ TRUIM Partners

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 1 | 100% |
| Software | 1 | 100% |
| Training | 1 | 100% |
| Education | 1 | 100% |
| Human Resources | 1 | 100% |

8 industries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Coursebase | Coursebase is a developer of a learning management system used in providing training through an enterprise web application. It delivers and manages all types of training that help to automate course registration, grading of assignments, email reminders, surveys, and reports for online and in-person training courses that enable clients to createcourses and assign tests for their employees. |  | Seed | Mar 26, 2013 |  |

1 of 1 investments shown.

## Co-investors
- [500 Global](https://shizune.co/investors/profile/500-startups) — VC Fund, 1 deal together
- [CyberAgent Capital](https://shizune.co/investors/profile/cyberagent) — VC Fund, 1 deal together
- [DG VENTURES](https://shizune.co/investors/profile/dg-incubation) — VC Fund, 1 deal together
- [Digital Garage](https://shizune.co/investors/profile/digital-ga) — VC Fund, 1 deal together
- [SunBridge Global Ventures](https://shizune.co/investors/profile/sunbridge-global-ventures) — VC Fund, 1 deal together

## About TRUIM Partners

VC Fund



1 contacts available at TRUIM Partners.

| Name | Title | Profile |
| --- | --- | --- |
| Etsuji Otsuka | Co-founder and CIO | https://shizune.co/investors/profile/etsuji-otsuka |

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## FAQ

### What does Etsuji Otsuka invest in?

Etsuji Otsuka invests primarily in Apps, Software and Training startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Etsuji Otsuka last invest?

The most recent investment recorded for Etsuji Otsuka closed in Mar 2013. Shizune tracks 1 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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