Startup profile for Shizuku AI: latest funding, latest known valuation, total disclosed funding, investors, status, sources, and why the company is interesting. Part of the Venture Capital Tracker startup directory.
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Shizuku AI funding, valuation and investors

AI companion and VTuber character platform from StreamDiffusion researcher Akio Kodaira.

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Funding, valuation & investors

Answer-first snapshot

Latest funding

Seed

$15M · February 2026

Latest known valuation

Not publicly disclosed

Total disclosed equity funding

$15M

Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.

Current status

private

seed · Japan / United States

Investors in latest funding

Lead: Andreessen Horowitz

Sources: latest funding Last verified: 2026-07-25

Overview

Shizuku AI builds AI companions and virtual characters, starting with Shizuku — an AI VTuber that streams on YouTube, Discord, and X in Japanese and English. Founder Akio Kodaira created Shizuku while completing a Ph.D. at UC Berkeley and is lead author of StreamDiffusion, real-time image generation research published at ICCV 2025 with 10,000+ GitHub stars. The company is establishing an AI lab in Japan to improve multilingual voice synthesis, proactive conversation, and cross-platform presence. In February 2026, Andreessen Horowitz led a $15M seed round — reported as a16z's first public investment in a Japan-related AI startup — with DeNA participating. Shizuku AI's thesis: community interaction across platforms creates the data loop needed for engaging, non-monotonous AI companions.

Why Shizuku AI is interesting

a16z's first public Japan-linked bet backs an AI VTuber with a live community feedback loop — competing with xAI's Ani in the character-AI race.

Product & use cases

Shizuku AI develops AI-native virtual characters with real-time streaming, chat, and voice synthesis. The flagship Shizuku VTuber interacts with fans across YouTube, Discord, and X while the team trains models on community engagement data.

  • Interactive AI VTuber streams for entertainment and community building
  • Multilingual AI companion experiences on Discord and social platforms
  • Research testbed for proactive conversational AI with live user feedback

Key facts

  • Seed (Feb 2026): $15M led by a16z; DeNA participated (a16z announcement, Nikkei)
  • Founder Akio Kodaira authored StreamDiffusion (ICCV 2025; 10k+ GitHub stars)
  • First public a16z investment linked to a Japan-based AI startup (press reports)
  • Shizuku VTuber relaunched as V2.0 with activity on YouTube, Discord, and X (The Bridge)

Funding history (newest first)

Seed

2026-02 $15M

Source: https://a16z.com/announcement/investing-in-shizuku-ai/

Investors in our directory

Funds linked from Shizuku AI's profile — open a fund page for stage focus and related deal articles.

Andreessen Horowitz

Competitive landscape

Edge: Founder Akio Kodaira's StreamDiffusion pedigree plus an existing VTuber community gives Shizuku AI a data flywheel that generic chatbot wrappers lack.

AI companion startups multiply, but few combine frontier real-time generation research with an active VTuber audience. Shizuku AI bets community-driven iteration beats closed-lab model tuning — execution risk is sustaining engagement beyond novelty.

  • Character.AI direct

    Large-scale character chat platform; less focus on live VTuber streaming and Japanese character design.

  • xAI (Ani) direct

    Emerging AI character from xAI; competes for companion-AI attention.

  • Replika adjacent

    Consumer AI companion app; different format from VTuber/live-stream presence.

Notable stories

  • Akio Kodaira launched Shizuku as a live AI VTuber on YouTube in January 2023 while still finishing his Berkeley Ph.D. — years before a16z led a $15M seed for the full Shizuku AI lab (a16z announcement, 2026).
  • StreamDiffusion, Kodaira's real-time generation paper, hit 10,000+ GitHub stars — technical credibility that underpins the companion product roadmap (a16z, ICCV 2025).

Industries

AI & Machine Learning Media & Entertainment

Related funding articles

Venture Capital Tracker pieces that cover Shizuku AI's financing or category context.

FAQs about Shizuku AI

Practical answers founders, operators, and investors typically search for.

Shizuku AI builds AI companions and virtual characters, starting with the Shizuku VTuber that streams and chats across YouTube, Discord, and X.
Andreessen Horowitz led a $15M seed round in February 2026. DeNA also participated. See /fund/andreessen-horowitz.
Akio Kodaira founded Shizuku AI. He previously worked at Meta and Luma AI and is lead author of StreamDiffusion.
The company announced a $15M seed round in February 2026.
StreamDiffusion is Kodaira's real-time image generation research (ICCV 2025) achieving 90+ fps generation, with an open-source repo widely used in the AI community.
Shizuku is the flagship AI character; Shizuku AI is the company building companions and research around that character and future agents.
Character.AI focuses on text chat with many characters; Shizuku AI emphasizes live VTuber presence, streaming, and community-driven model improvement.
The company is building an AI lab in Japan while founder Kodaira has U.S. research roots (Berkeley, Meta, Luma).
No public profitability disclosure; the company is seed-stage with fresh 2026 funding.
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