Taizo Son
Founder @ Mistletoe
Taizo Son is a seed investor at Mistletoe focused on Medical Device and Financial Services. Taizo Son is the Co-Founder of VIVITA. Taizo Son attended the University of Tokyo.
- Total investments:
- 28
- Last investment:
- Lead investor:
- 39%
Last updated:
For AI agents: llms.txt
Industries Taizo Son invests in
Stages Taizo Son invests in
Countries Taizo Son invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $493k–$4.5M
- Angel
- $737k–$2.2M
- Series A
- $1.8M–$30M
Investment Focus
Industry
- Medical Device 3 (11%)
- Financial Services 3 (11%)
- Information Technology 3 (11%)
- Apps 2 (7%)
- Water 2 (7%)
Stage
- Seed 7 (25%)
- Series A 7 (25%)
- Angel 3 (11%)
- Corporate Round 3 (11%)
- Funding Round 2 (7%)
Country
- Japan 9 (32%)
- United States 5 (18%)
- Singapore 2 (7%)
- India 1 (4%)
- Estonia 1 (4%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Favolist5 is a software company that develops an abbreviated voice SNS based on web3 for personal media. | $737.2K / Angel / Jul 30, 2025 | ||
| Aquaria provides solutions to secure access to clean water. The organization adapts its approaches based on the needs of these communities. It addresses water-related challenges through various methods. | $12M / Nov 20, 2024 | ||
| AnotherBall is a blockchain startup that combines entertainment and blockchain. | $2.2M / Angel / May 16, 2023 | ||
| Funderbeam is a funding and trading platform that connects companies and investors to buy and sell equity stakes. The platform allows the founders to gain exposure, legal support, a funding manager, or an investor network. It also allows the investors to take control of their investments and trade anytime they want.The company was founded in 2013as a global data platform for startup companies. | $40M / May 04, 2023 | ||
| Novoloop is an upcycling company that provides a proprietary lifecycling platform to create chemicals and materials from plastic waste. Its Accelerated Thermal Oxidative Decomposition (ATOD) process chemically breaks down plastic films and packaging into monomers, which are then reassembled into virgin-quality TPU and recycled+ formulations. Thecompany operates a demonstration pilot plant in India in partnership with Aether Industries, producing up to 70 metric tons of TPU annually from mixed plastic waste. | $11.4M / Series A / Nov 19, 2021 | ||
| Instalimb is the world's first 3D printing prosthesis business. It uses advanced 3D printing, 3D-CAD, and machine-learning technologies to produce affordable, high-quality prosthetic legs. By integrating these tools into its manufacturing process, the company delivers reliable and low-cost 3D-printed prosthetics and orthotics. | $2.2M / Series A / Sep 30, 2021 | ||
| bina is a digital primary school ecosystem made to provide customised learning at scale.We are an early-stage startup backed by Silicon Allee in Berlin and are in the last stages of closing our initial funding round, led by Taizo Son at Mistletoe.Currently, bina offers:- Personalised education to ages 4-12 in tiny classes of no more than 8students.- Master teachers delving into STEAM-based learning using curated 3rd party tech and a storytelling narrative.- Classes and teachers are assigned into carefully matched learning groups to get the best and most enjoyable learning experience.We are building bina in two phases: The bina School operates as a comprehensive, synchronous, international primary school marketed directly to parents and HR departments. This school acts as a high-quality, cost-effective development of the product and brand. bina-as-a-service offers accreditation, teacher training and methodology, licensed globally to public and private educational systems. Once established, precision education will cross social, economic and geographic barriers. | $1.4M / Seed / Aug 03, 2021 | ||
| Mmhmm is a developer of a virtual camera application used to help make creative use of background during video conferencing calls. Its application integrates into the user's video calling applications and adds backdrops, allows users to team-up with their remote partners and give presentations together, and enables customers to make theirvirtual meetings more interesting and informative.The company was founded in 2020 and is headquartered in San Francisco, California. | $30.4M / Series A / Oct 07, 2020 | ||
| Playco is an instant-play gaming company that develops games that billions of people can play together. The company works closely with a vast network of partners from global tech and social media giants to new startups developing innovative technologies. | $100M / Series A / Sep 21, 2020 | ||
| Mmhmm is a developer of a virtual camera application used to help make creative use of background during video conferencing calls. Its application integrates into the user's video calling applications and adds backdrops, allows users to team-up with their remote partners and give presentations together, and enables customers to make theirvirtual meetings more interesting and informative.The company was founded in 2020 and is headquartered in San Francisco, California. | $4.5M / Seed / Jul 07, 2020 | ||
| See all 28 investments → | |||
Co-Investors
About Mistletoe
Mistletoe is a hub for startups and the overall entrepreneurial ecosystem. It specifically provides learning opportunities for entrepreneurs, facilitates startup communities, invests in and supports startup companies and venture capitals.
Mistletoe Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Atsushi Taira
Managing Director
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Mark Castleman
Partner
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Taizo Son
Founder
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FAQ
What does Taizo Son invest in?
Taizo Son invests primarily in Medical Device, Financial Services and Information Technology startups, most often at Seed and Series A stage. Most of the 28 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Taizo Son's check size?
Taizo Son typically joins rounds of $493k–$4.5M at Seed, $737k–$2.2M at Angel and $1.8M–$30M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Taizo Son participates in.
How do I contact Taizo Son?
Public channels for Taizo Son include LinkedIn, X (Twitter) and Facebook. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Taizo Son last invest?
The most recent investment recorded for Taizo Son closed in Jul 2025. Shizune tracks 28 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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