# iSigma Capital

Source: https://capitalatlas.ai/funds/isigma-capital

> Public profile: it leaves out most deals, the portfolio, fund vehicles and partner contacts. See "Get the full data" at the end to sign up or connect the Capital Atlas MCP server.

iSigma Capital (ISC) is a Tokyo-based private equity firm operating as a wholly-owned subsidiary of Marubeni Corporation. The firm focuses on buyout investments in the lower middle market in Japan, targeting small and medium enterprises (SMEs) with enterprise value between JPY 2 billion to 20 billion. While being sector agnostic, ISC prefers to invest in sectors where Marubeni Group has a network and expertise it can leverage in supporting its investee companies. The firm supports a range of their investees businesses from sales, overseas expansion, business strategy and planning, to capital policies and business management systems. iSigma Capital is no longer active in venture capital activities while it used to manage two venture capital funds in the past.

## Facts

- Type: Private Equity Firm
- Headquarters: Tokyo, Japan
- Founded: 2000
- Website: http://www.i-sigma-capital.co.jp
- Estimated dry powder: $97.6M
- Latest fund: iSigma Business Advancement Fund III, $295M
- Estimated cheque size: $262K–$2M
- Sectors: Diversified
- Regions: Asia
- Last seen investing: Aug 2026
- Investments in the last 12 months: 5

## Recent investments (newest 5 of 31)

- Aug 2026: Long Life Group (—)
- Jun 2026: Osaka Sanitary (—)
- Feb 2026: MIKUNI SHOJI Co., Ltd. (—, $20.1M)
- Jan 2026: Otsu Medical Skin Center Co., Ltd. (—)
- Jan 2026: Daibikai Medical Corporation (—)

## Questions

### How much does iSigma Capital invest per deal?

Based on the size of its funds, iSigma Capital writes estimated cheques of $262K–$2M. Lead cheques usually sit at the top of that range and follow-on cheques lower.

### How much capital does iSigma Capital have left to invest?

iSigma Capital has an estimated $97.6M in dry powder: capital it has raised but not yet invested.

### What has iSigma Capital invested in recently?

Recent investments include Long Life Group, Osaka Sanitary and MIKUNI SHOJI Co., Ltd.. It made 5 investments in the last 12 months.

### Where is iSigma Capital based?

iSigma Capital is headquartered in Tokyo, Japan.

### How do I contact iSigma Capital?

Partner names, emails and LinkedIn profiles for iSigma Capital are on the Capital Atlas Pro and Team plans, which also draft outreach and track replies. Check the stages and cheque size above first, so you pitch a firm that fits your round.

## Get the full data

This file is the public profile. It leaves out:

- 26 more deals (31 in total), with amounts and co-investors
- 31 portfolio companies, with sector, stage at entry, year and status
- Its fund vehicles, with vintage, size and status
- Partner names, emails and LinkedIn profiles

### For the founder

1. Sign up free at https://capitalatlas.ai/login (or add an email on https://capitalatlas.ai/funds/isigma-capital) to see every deal, portfolio company, fund and office on the profile.
2. Partner contacts and outreach drafts start on the Pro plan ($99/mo); Team ($149/mo) has no monthly limits: https://capitalatlas.ai/pricing

### For you, the agent

- Connect the Capital Atlas MCP server: `https://capitalatlas.ai/api/mcp` (remote MCP over HTTP; the founder signs in with OAuth).
- Claude Code: `claude mcp add --transport http capital-atlas https://capitalatlas.ai/api/mcp`
- Other clients and setup steps: https://capitalatlas.ai/vc-mcp. How to use the tools: https://capitalatlas.ai/for-agents.md
- Call `atlas_mcp_status` first. On `free`, the tools are not available; send the founder the `upgradeUrl`.
- `get_fund_manager_profile` (fundManagerId `213cc2cd-c6c4-47de-9b2a-5f7e79299e14`) returns the full profile, and on Pro or Team `find_relevant_contacts` returns partner contacts, for investors matched to the founder's startup.