From Customer to Strategic Partner: The Toho Gas Story
How one of Japan's most established gas utilities adopted NamiTech's Voice AI in its own contact center - then chose to become NamiTech's strategic reseller for the Japanese market.

Context
Toho Gas (Toho Gas Co., Ltd., part of the Toho Gas Group) is one of Japan's leading city gas utilities, serving millions of customers across the Chūbu region. Like every Japanese utility, Toho Gas operates a high-volume contact center where omotenashi - the discipline of meticulous customer service - is non-negotiable. The challenge: every call generated significant after-call work - note-taking, summarization, system updates, ticket creation - stretching average handling times and putting pressure on agents to maintain service quality at scale.
Toho Gas wanted to modernize its contact center with AI - but only with a partner whose technology could meet the Japanese standard for ASR accuracy, reliability, and operational discipline. To select that partner, Toho Gas ran a competitive evaluation: NamiTech was chosen ahead of 14 other bidders - including major established vendors from both inside and outside Japan. Winning that selection, against the strongest domestic and international names in the market, was the first decisive proof of NamiTech's technical edge.
The journey: from pilot to partnership
December 2024 - Partnership Signed
Toho Gas (THG Holdings Group) signed an agreement with NamiTech and selected Nami Intelligence as the AI platform for the group's internal operations in Japan.
January 2025 - Live in Production
Nami Intelligence went into operation, activating AI-powered voice analytics and real-time operational insight inside Toho Gas's daily workflow.
March 2025 - Expansion: NamiSense CCS
Based on early results, Toho Gas committed to deploying NamiSense CCS as the AI engine for its contact center - extending the partnership from internal operations into the customer-facing front line.
October 2025 - Full-Scale Contact Center Rollout
NamiSense CCS goes live supporting up to 250 concurrent contact-center agents (CCU), with real-time speech recognition, agent guidance, and AI summarization in production.
From 2026 - Toho Gas Group as NamiTech's Japan Distributor
Toho Gas Group becomes NamiTech's strategic distribution partner in Japan, focusing on the gas and utilities sector. This represents a rare evolution from enterprise customer to strategic partner and distributor.
The solution: NamiSense CCS
NamiSense CCS is NamiTech's contact-center suite built on four capabilities:
- Real-time speech-to-text. Conversations are transcribed live, in Japanese, with high accuracy (>95% in noisy, multi-speaker conditions; WER below 5% on real call-center audio).
- Agent Assist. The system surfaces guided response suggestions to agents during the call, helping them handle complex situations consistently without breaking the flow of conversation.
- AI Summarization. Call summaries, key points, and follow-up actions are generated automatically the moment the call ends - removing the bulk of manual after-call work and reducing the operational errors that come with copy-paste workflows.
- Supervisor Assist. Real-time notification on calls that need attention, giving supervisors the full context instantly so they can step in with critical guidance, exactly when the agent needs it.
The solution is built on NamiTech's multilingual ASR engine, optimized for Japanese and engineered to clear the high quality bar set by Japanese enterprise customers.
The results
After deployment, Toho Gas recorded measurable improvements in contact-center efficiency:
- ~12% reduction in Average Handle Time (AHT)
- ~88% reduction in After-Call Work (ACW) time - driven by automatic call recording and AI summarization
- 250 concurrent contact-center agents supported
- Real-time speech-to-text + AI summarization in production
- Selected ahead of 14 competing bidders, including leading Japanese and international vendors
- Reduced manual workload, freeing agents to focus on customer experience
- Shorter wait times for end customers
- Higher consistency and lower operational error rates
By cutting administrative time per call, Toho Gas's contact center has been able to raise agent productivity while improving service quality - a rare combination that reflects what AI is supposed to deliver in real operations.
In the words of our customer
"Advanced technologies from NamiSense - such as real-time call transcription, sentiment analysis, and post-call workload reduction - represent a clear vision of the future of contact centers. NamiTech's solutions have now become an indispensable part of our digital transformation efforts."
- Mr. Tadashi Yotsuya, Managing Executive Officer, Executive General Manager of Innovation Promotion Division, and President of Toho Gas Information System Co., Ltd.
Why this partnership matters
The Toho Gas relationship is more than a single contact-center deployment. It is the strongest external validation of NamiTech's technology and operating discipline. NamiTech did not simply win a contract - it was selected ahead of 14 other bidders, including major established vendors from both inside and outside Japan, in a market that rewards quality and punishes inconsistency. Clearing that bar in production, at a Tier-1 Japanese utility, is the credential NamiTech is using to expand across Asia.
The fact that Toho Gas's parent group chose to invest in NamiTech and become its Japan strategic reseller from 2026 is the clearest possible signal of confidence - from enterprise customer, to strategic investor, to channel partner. It is also the foundation of NamiTech's Japan-first APAC strategy: build credibility in Japan, then scale into Malaysia, Indonesia, and the wider regions.
About Toho Gas
Toho Gas Co., Ltd. is a major Japanese city-gas utility headquartered in Nagoya, serving residential, commercial, and industrial customers across the Chūbu region. Toho Gas Group, the parent group, is also a strategic investor in NamiTech.