No codingDeploy to Web & LINEData stays in Japan

Launch a Japanese-speaking AI support agent in minutes

Custama turns your documents, FAQs, and website into a self-learning AI chatbot — tuned to your brand's tone and deployed across your website, LINE, and WhatsApp. No code. Your data stays in Japan.

Live the same day

Upload your content and publish a working agent in minutes.

Hosted in Japan

AI inference and data stay in the Tokyo region.

Web, LINE & WhatsApp

One agent across every channel your customers use.

Self-learning

Answers improve automatically from real conversations.

What will your AI agent do?

Pick a goal — Custama configures the right agent role, tone, and workflows for it.

From your content to a live agent in four steps

Ingest your knowledge

Upload PDFs, documents, your website URL, or images. Custama structures them into a searchable knowledge base automatically.

Customize identity & tone

Set your agent's name, look, and role, then tune its tone — including Japan-aligned politeness. Per-message adaptive tone responds to each customer's emotion.

Deploy across channels

Embed a widget on your site and connect LINE and WhatsApp from one place. Copy one snippet and you're live.

It improves itself

Custama analyzes conversations every week and suggests new answers for you to approve.

Built for Japanese business — and the AI era

See how Custama compares to legacy FAQ chatbots.

Feature
Legacy FAQ chatbot
Custama
SetupWeeks of scripting and scenario treesUpload your content — live the same day
AnswersRigid keyword matchingLLM understanding, grounded in your knowledge base
ToneOne fixed styleAdaptive, emotion-aware, Japan-ready tone
ChannelsWeb only, or paid add-onsWeb + LINE + WhatsApp built in
ImprovementManual maintenanceSelf-learning with weekly AI suggestions
Human handoffSeparate toolBuilt-in live chat + tickets
Data locationOften unclearProcessed and stored in Japan
Japan Data Residency Certified

Your customers' data never leaves Japan

AI inference runs on Claude via Amazon Bedrock in the Tokyo region. Your knowledge base and conversation history are stored in Japan, encrypted in transit and at rest. Your data is never used to train the AI model.

Learn more about security

In-region inference

Requests are processed inside Japan, not routed overseas.

Japan-resident storage

Knowledge base and conversations stay in the Tokyo region.

No training on your data

Customer inputs and outputs are not used to train models.

One agent, every channel your customers use

Deploy once. Custama routes conversations across Web, LINE, and WhatsApp seamlessly.

🇯🇵 Most popular in Japan

LINE

Japan's most-used messaging app

Meet customers exactly where they already are. Connect Custama to LINE in minutes and handle support conversations natively — no app switching required.

Connect LINE

Website widget

One snippet, instant support

A floating, on-brand chat widget added with a single line of code. Fully customizable to match your site.

Connect Website widget

WhatsApp

Cross-border & inbound audiences

Reach international customers and inbound visitors on WhatsApp — connected from the same Custama dashboard.

Connect WhatsApp

Everything you need to automate support and sales

A complete platform — from knowledge ingestion to analytics.

Adaptive tone

Emotion-aware replies on top of your baseline tone, with Japan-ready regional presets.

No-code workflows + custom API tools

Collect info, call your systems, and respond — without engineers.

Live agent handoff

Hand a chat to a human in real time, with full context preserved.

Tickets + email integration

Turn unresolved chats and inbound emails into tracked tickets automatically.

Structured knowledge & AI suggestions

Auto-built FAQs and weekly improvement suggestions to keep your agent sharp.

Conversation analytics & sentiment

See what customers ask, how they feel, and where your agent can improve.

Built for every team and industry

From EC to public sector — Custama adapts to your industry's needs.

EC & Retail

Deflect order, shipping, and returns questions 24/7.

Finance

Handle product and procedure questions with strict data handling.

Hospitality & Tourism

Answer guests and inbound visitors, in multiple languages.

SaaS

Onboard users and reduce support load with an always-on agent.

Public sector

Resident inquiries handled with data kept in Japan.

Trusted to handle real conversations

2.4M+
Conversations handled
across all channels
84%
Self-resolution rate
no human needed
< 1s
Average response time
median across agents
4.8 / 5
Customer satisfaction
from post-chat surveys
We deployed a LINE support agent in a single afternoon. Our support ticket volume dropped 60% in the first month — and customers actually prefer the bot.
Kenji Watanabe, Head of Customer Experience at Sakura Commerce
Kenji Watanabe
Head of Customer Experience · Sakura Commerce Co.
The data residency guarantee was the deciding factor for our compliance team. Everything stays in Japan, the setup was straightforward, and the Japanese politeness presets are genuinely impressive.
Yuki Tanaka, CTO at Horizon FinTech KK
Yuki Tanaka
CTO · Horizon FinTech KK
Our hotel guests get instant answers in Japanese, English, and Chinese — 24/7. The emotion-aware tone means anxious guests get a warm, reassuring response every time.
Mika Hashimoto, Director of Operations at Fuji Grand Hotel Group
Mika Hashimoto
Director of Operations · Fuji Grand Hotel Group

Trusted by leading Japanese businesses

We help you get live — and keep improving

Guided onboarding, documentation, and support so you launch quickly and your agent keeps getting better.

Frequently asked questions

Have more questions? We're happy to help.

Contact support
Yes. AI inference runs in the Tokyo region via Amazon Bedrock, and your knowledge base and conversation data are stored in Japan. Your data is never used to train the AI model.
Yes. Custama answers in natural Japanese with adjustable politeness levels and Japan-aligned tone presets — including keigo (formal) and casual registers. The emotion-aware system also adapts to the customer's emotional state in each message.
Yes. Connect LINE (and WhatsApp) alongside the website widget from one place. No separate tools or integrations — it's all built into Custama.
No. Building, customizing, and publishing your agent are entirely no-code. Workflows can call your APIs without engineering — you configure them visually. One embed snippet gets the widget onto your website.
Custama analyzes real conversations every week and automatically identifies gaps in your knowledge base. It then suggests new answers for you to review and approve — you stay in control of what the agent learns.
Yes. Live agent handoff connects a human in real time with full conversation context. When no agent is available, Custama creates a ticket automatically so nothing falls through the cracks.

Launch your AI agent today

Build a Japanese-speaking support agent in minutes — no code, deployed to web and LINE, with data kept in Japan.