Captio AI
🦻 Accessibility + 💻 Productivity App

Japanese live captions and productivity tool for restaurants & cafes

For deaf and hard of hearing people.

Download for free

Download on theApp Store
Captio AI app showing live captions

Download for free

Download on theApp Store
Use Cases

Every situation covered

Designed for the real moments that matter — not just quiet controlled environments.

🍽️Dinner with friends

Dinner with friends in Japan unfolds over shared izakaya dishes or a kaiseki course — a back-and-forth of ordering, commenting on dishes, and conversation. Following who is saying what across a loud izakaya floor without captioning is genuinely difficult.

💼Business lunches

Business lunches in Japan involve high-stakes social signalling. The register is formal, side comments matter, and missing a polite gesture embedded in language — an offer, a deferral — creates real professional risk.

Cafe catch-ups

A kissaten or modern café is a frequent meeting spot for quick catch-ups. Orders and conversation flow briskly at the counter, and the background hum of a busy Tokyo or Osaka café adds noise on top of fast Japanese.

🌍Restaurants abroad

Eating out while travelling through Japan — from Sapporo to Fukuoka — means navigating local dialects and regional accents. Captio AI captions whatever regional variety is spoken.

🎂Celebrations and group meals

Celebrations in Japan — enkai banquets, birthday dinners, welcome parties — are loud and structured, with toasts, speeches, and cross-table conversation running together. A hard of hearing person at a noisy banquet hall is at the margin of every conversation.

❤️Dates and one-on-one meals

A one-on-one dinner at a quiet Tokyo restaurant carries the quiet pressure of unbroken conversation. Missing a sentence in Japanese — where context and politeness are carried in the final verb form — can shift the meaning of the whole exchange.

Performance

Most accurate and fastest models

Japanese
91.3%

character accuracy

independent benchmark, 2025

< 200ms
you speak
captions

real-time captions

first word appears as you speak

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Captio AI in everyday use
Why Captio AI

Built for the table — however noisy the room

Follows the person across the table

Point the microphone toward the person speaking and Captio AI captions them through the background noise. You do not need to face them, watch their lips, or lean in.

Works through restaurant noise

Restaurant noise averages 80 dBA — well above comfortable conversation level. Captio AI is built for these real environments, not quiet controlled rooms.

Place it and forget it

Put the phone on the table between you and the other person, microphone facing them. You glance at it as needed. No adjusting between sentences, no managing the setup.

No asking for repeats during the meal

Every word appears in real time. If you missed something, the caption is there — you do not need to stop the conversation and ask anyone to say it again.

Any language

For restaurants abroad, multilingual dining companions, or waitstaff who speak a different language. Live Translator captions and translates in real time with no manual setup.

Discreet

A phone on a restaurant table is unremarkable. Captio AI runs quietly, the screen faces you, and most dining companions adapt naturally once they understand what it does.

Japanese

Why Japanese is hard to understand

Pitch accent invisible

  • Tone changes meaning but leaves no lip trace
  • Standard Tokyo Japanese uses a mora-based pitch accent system where a single pitch downstep distinguishes between words spelled identically. 'Hashi' (bridge, chopsticks, or edge) shifts meaning with a high-low pattern carried entirely by pitch — nothing on the lips changes. In restaurant settings where context shifts rapidly, these distinctions collapse without hearing.

Fast moraic rhythm

  • Rapid-fire syllables with uniform lip movement
  • Japanese speech unfolds in short, evenly timed morae rather than the stress-timed patterns of European languages. This creates a machine-gun rhythm where lip shapes cycle fast and uniformly. Servers reciting the daily set meal at a counter restaurant speak at high speed with minimal facial expression.

Keigo register shift

  • Formal restaurant Japanese sounds like a different language
  • Restaurant staff use keigo — a formal register with entirely different verb forms, prefixes, and vocabulary from everyday speech. A deaf or hard of hearing person faces an unfamiliar word set that even keigo-fluent diners process slowly. The set phrases ('Irasshaimase', 'Gochisousama') give few contextual cues without captions.

Kansai vs Tokyo split

  • Regional dialect reverses the entire pitch pattern
  • Kansai Japanese (Osaka, Kyoto, Kobe) reverses pitch patterns relative to Tokyo: words that are high-first in Tokyo are low-first in Kansai. For a lip-reader relying on context from speech rhythm, a Kansai restaurant team is effectively speaking a different phonological system.

Connected speech compression

  • Particles and sentence endings disappear at speed
  • In casual table Japanese, grammatical particles are swallowed or dropped, and sentence-final forms contract ('desu' → 'su', 'te iru' → 'teru'). The compressed forms bear little resemblance to textbook Japanese, making even high-literacy deaf signers work harder to decode overheard speech.

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The Challenge

Hearing loss in Japan: dining behind the silence

Japan's JapanTrak 2018 survey estimated hearing loss prevalence at approximately 11% of the population. Among adults over 65, the figures are far higher: 43.7% of men and 27.7% of women aged 65–69 have measurable hearing loss, rising to 84.3% and 73.3% respectively among those over 80. With an estimated 16.5 million people over 65 with hearing impairment, Japan faces a large and growing population navigating daily life — including restaurants — without full hearing.

Hearing aid adoption in Japan is among the lowest in the developed world at approximately 14%, compared to 37–48% in European countries. Cultural factors, stigma, and a healthcare system that does not cover hearing aids for most adults as standard mean that millions of Japanese people with significant hearing loss go unequipped in noisy public settings. The gap between prevalence and provision leaves a large share of Japan's population without tools for social participation in the restaurant culture that defines so much of daily and professional life.

Captio AI captions Japanese conversation in real time — whether a server in Osaka runs through the special set menu in fast Kansai Japanese or a colleague leans across the table at a kaiseki lunch to say something only for you.

Download for free

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Privacy

What you hear stays with you.

Gone the moment it ends

Captio AI processes your audio in real time and discards it immediately. Nothing is recorded. Nothing is kept.

Not a product

Your conversations are not something Captio AI sells, shares, or monetizes — to anyone, for any reason.

Not used to train anything

What you say in a doctor's appointment or a job interview never ends up in a training dataset. Not ours. Not anyone else's.

100% PRIVATE

Private by default

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Reviews

People love Captio AI

"Izakaya nights were always exhausting — background music, everyone talking, and keigo from the server I can't lip-read. Captio turns the table speech into text I can actually read."

Yuki T. 🇯🇵
yuki.t***@gmail.com
Tokyo, moderate hearing loss since age 30

"Kansai dialect at a local restaurant is hard enough for people from Tokyo. For me with hearing loss it was basically noise. Captio follows the Osaka accent perfectly."

Hiroshi M. 🇯🇵
hiroshi.m***@gmail.com
Osaka, wears hearing aids

"Business lunches in Japan have so many keigo phrases that sound alike on the lips. With Captio I actually see the full sentence, including the polite endings that signal what the other person is actually trying to say."

Akiko S. 🇯🇵
akiko.s***@gmail.com
Nagoya, congenital deafness

"Kaiseki course restaurants are quiet and formal — the server explains each dish in detail. I used to miss most of it. Now I read every description in real time and actually enjoy the meal the way it was meant to be enjoyed."

Kenji N. 🇯🇵
kenji.n***@gmail.com
Kyoto, progressive hearing loss

"Izakaya nights were always exhausting — background music, everyone talking, and keigo from the server I can't lip-read. Captio turns the table speech into text I can actually read."

Yuki T. 🇯🇵
yuki.t***@gmail.com
Tokyo, moderate hearing loss since age 30

"Kansai dialect at a local restaurant is hard enough for people from Tokyo. For me with hearing loss it was basically noise. Captio follows the Osaka accent perfectly."

Hiroshi M. 🇯🇵
hiroshi.m***@gmail.com
Osaka, wears hearing aids

"Business lunches in Japan have so many keigo phrases that sound alike on the lips. With Captio I actually see the full sentence, including the polite endings that signal what the other person is actually trying to say."

Akiko S. 🇯🇵
akiko.s***@gmail.com
Nagoya, congenital deafness

"Kaiseki course restaurants are quiet and formal — the server explains each dish in detail. I used to miss most of it. Now I read every description in real time and actually enjoy the meal the way it was meant to be enjoyed."

Kenji N. 🇯🇵
kenji.n***@gmail.com
Kyoto, progressive hearing loss

Download for free

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FAQ

Frequently asked questions

Have a real conversation through the noise in Japanese.

Captio AI is free to start

Download for free

Download on theApp Store