NTT Communications COTOHA Voice

by NTT Communications

Don’t want to wire up the NTT Communications COTOHA Voice API? Drop the file here.

The first 20 minutes of any recording are transcribed free: a recording up to 20 minutes transcribes in full, a longer one is previewed, and a pack from $6 (500 minutes) transcribes the rest and opens every export, and credits never expire.

NTT Com's Japanese-first STT under the COTOHA AI platform.

API  ·  tiered JPY-denominated

TL;DR

Best for japanese enterprise customers needing domestic vendor + data-residency. Pricing: tiered JPY-denominated.

Category
Transcription APIs
Pricing
tiered JPY-denominated
Platforms
API

What it is

COTOHA is NTT Communications' Japanese-language AI platform. The voice family includes speech-to-text and text-to-speech APIs tuned for Japanese, with broadcast-quality models and call-center variants. NTT Com pitches it for domestic data-residency-sensitive workloads (finance, government, healthcare). International availability and English support are limited; the product is primarily B2B inside Japan. Best fit: japanese enterprise customers needing domestic vendor + data-residency. Caveats: japanese-first; documentation primarily in japanese. Pricing as listed: tiered JPY-denominated. Feature flags from vendor docs: streaming. Directory tags: commercial-api, regional-asia. Last vendor-page check: 2026-05-12.

Best for: Japanese enterprise customers needing domestic vendor + data-residency.
Watch out for: Japanese-first; documentation primarily in Japanese.

Install / use

COTOHA API: POST /v1/voice

What people actually do with NTT Communications COTOHA Voice-style transcription

The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.

Wire it into Amazon S3n8nMake.comGoogle DriveZapierSlack

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeYes
Languages supported1
HIPAA eligibleNo

NTT Communications COTOHA Voice vs Whipscribe

FeatureNTT Communications COTOHA VoiceWhipscribe
CategoryTranscription APIsTranscription APIs
PricingNot verified$6–$24 one-time packs (credits never expire) · first 20 minutes free
Speaker identificationNot verifiedNamed in the summary, key quotes and chapters
Word timestampsNot verifiedYes
StreamingNot verifiedNo
Languages199
PlatformsAPIWeb, API, MCP

Alternatives to NTT Communications COTOHA Voice

Frequently asked about NTT Communications COTOHA Voice

What platforms does NTT Communications COTOHA Voice support?

NTT Communications COTOHA Voice is an API — you call it from whatever you build, on any platform with an HTTP client.

How do I get started with NTT Communications COTOHA Voice?

NTT Communications COTOHA Voice is used through its API: get a key from the vendor, then call it from your own code. There is no desktop app to install.

How many languages does NTT Communications COTOHA Voice support?

NTT Communications COTOHA Voice lists 1 languages.

What are the limitations of NTT Communications COTOHA Voice?

Japanese-first; documentation primarily in Japanese.

Who is NTT Communications COTOHA Voice best for?

Japanese enterprise customers needing domestic vendor + data-residency.

Is NTT Communications COTOHA Voice open source?

No. NTT Communications COTOHA Voice is a proprietary API. If you need source you can read and run yourself, the open-source tools in this directory are the place to look.

What kind of tool is NTT Communications COTOHA Voice?

In this directory NTT Communications COTOHA Voice is filed under commercial api, regional asia as a API.

What are the alternatives to NTT Communications COTOHA Voice?

There is a side-by-side page at /tools/ntt-com-cotoha-alternatives comparing NTT Communications COTOHA Voice with the closest tools in the same category on price, platform and features.

Can I automate NTT Communications COTOHA Voice-style transcription without running it myself?

Yes. If what you want is transcripts rather than the tool itself, Whipscribe does the same job as a hosted API: submit a file or URL, poll a job id, pull the result as txt, json, srt, vtt or docx. $0.012 a minute — about $0.72 an audio hour — bought as credits that never expire. The automation recipes on this site show it wired to Drive folders, Zoom recordings, S3 buckets and no-code platforms.

How is Whipscribe different from NTT Communications COTOHA Voice?

NTT Communications COTOHA Voice is another vendor's product; Whipscribe is a per-minute transcription service. Recordings are transcribed on our own servers and never used for training, and every job returns five formats plus an AI summary, quotes and topics. The first 20 minutes of any recording are transcribed free, and a pack from $6 (500 minutes) transcribes the rest and opens every export.

What does transcription cost if I use Whipscribe instead of NTT Communications COTOHA Voice?

$0.012 a minute — about $0.72 an audio hour — bought as credits that never expire. There is no subscription and no monthly minimum: a 3-hour recording is about $2.16, a thousand-hour archive is about $720 once. The first 20 minutes of any recording are transcribed free, and a pack from $6 (500 minutes) transcribes the rest and opens every export, so you can see what your recording holds before paying anything.

Where is the NTT Communications COTOHA Voice category heading?

Three things are moving across the whole speech-to-text market right now: summaries, action items and speaker insights generated on top of the transcript rather than sold separately; private, secured deployment where the audio never leaves a boundary you control; and agent access — transcription exposed as a tool that Claude, Cursor or a workflow runner can call directly. Whipscribe ships all three today: per-job insights, our own servers, and an MCP server.

Whipscribe is a hosted transcription service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.

Transcribe your recordings

Explore

Have the recording already?

Skip the setup and send the file or the link: see MP3 to text for long recordings, how to transcribe a podcast and the SRT generator.

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