Smart Energy Week Tokyo: Clean Energy Show Guide and Leads
By Ilyas Kerbal,
SMART ENERGY WEEK, organised by RX Japan, is Japan’s largest exhibition for renewable and clean energy. It brings together seven specialised shows, from hydrogen and fuel cells to solar, batteries and wind, and runs alongside Green Transformation Week. Japanese utilities, trading houses, manufacturers and international technology suppliers all meet here, which makes the Smart Energy Week attendee list a key route into Japan’s decarbonisation and hydrogen markets.
This guide is for the spring 2027 edition.
Smart Energy Week at a glance
| Industry | Energy / hydrogen / solar |
| City | Tokyo, Japan |
| Venue | Tokyo Big Sight (spring); separate autumn/Osaka editions |
| Dates | Spring, 2026: 17–19 Mar (earlier editions in late Feb/early Mar) |
| Frequency | Annual |
| Moves between cities? | No for the Tokyo spring show (other regional editions) |
| Typical scale | ~60,000 attendees · ~1,500 exhibitors |
| Visitor ticket | Free with pre-registration (RX Japan policy) |
| App / platform | Online registration + RX Japan meeting tools |
| Official website | wsew.jp |
Details checked in October 2026. Dates, prices and venues can change between editions, so confirm on the official Smart Energy Week website before you book travel.
Seven shows in one week
| Show | Focus |
|---|---|
| H2 & FC EXPO | Hydrogen and fuel cells |
| PV EXPO | Solar PV |
| BATTERY JAPAN | Batteries and energy storage |
| SMART GRID EXPO | Smart grids and VPP |
| WIND EXPO | Onshore and offshore wind |
| BIOMASS EXPO | Biomass |
| ZERO-E THERMAL EXPO | Zero-emission thermal |
Green Transformation Week (Decarbonisation Expo and Circular Economy Expo) runs alongside.
The spring Smart Energy Week flagship is held at Tokyo Big Sight. Photo: Guilhem Vellut, CC BY 2.0, via Wikimedia Commons.
Venue and dates
The spring flagship is held at Tokyo Big Sight in Ariake. The 2026 edition ran 17–19 March; earlier editions were in late February or early March, so dates shift. RX Japan also runs Smart Energy Week editions in other seasons and in Osaka.
Who attends
| Visitor | Interest | Who should target them |
|---|---|---|
| Japanese utilities and energy companies | Technology and projects | Equipment and tech suppliers |
| Trading houses (sogo shosha) | Products and partners | International suppliers |
| Manufacturers and EPCs | Components and partners | Component makers |
| Local governments | Decarbonisation projects | Solution providers |
| International suppliers | Japanese customers | Trading houses, utilities |
| Researchers | Technology | Universities, labs |
Going to Smart Energy Week with a sales target? Get the list first. I compile who is exhibiting and attending, add titles, company size and LinkedIn links, and send it as a file your SDRs can work from on day one. Get the Smart Energy Week list
Registration
Visitors pre-register online for free entry badges; RX Japan shows charge admission to visitors without registration, so confirm on wsew.jp. Open seminars are free, and conference sessions need registration (some paid). Under-18s must be accompanied by an adult.
Meeting tools and data
Registration, exhibitor search and meeting requests run through wsew.jp. In Japan, trading houses and utilities make many energy decisions, and they rarely respond to cold approaches on the show floor. Identifying the right departments and people in advance, and reaching them before the show, is what gets meetings booked.
Pros and cons
| Pros | Cons |
|---|---|
| The broadest clean energy coverage in Japan | Japanese-language business culture |
| Free with pre-registration | Long sales cycles |
| Strong hydrogen focus | Seven shows can dilute focus |
| Access to trading houses and utilities | Tokyo costs |
| RX Japan’s efficient meeting culture | Dates shift year to year |
Outdated titles and missing companies cost you meetings. I clean and enrich Smart Energy Week profiles before delivery, so the file you import is one your reps can trust. Get a clean Smart Energy Week list
Preparing for Smart Energy Week 2027
- Check the dates as soon as RX Japan publishes them.
- Pick one or two shows that match your technology.
- Target trading houses for market entry.
- Prepare Japanese materials and case studies.
- Request meetings a month ahead.
- Plan for long relationship-building.
FAQ
When is Smart Energy Week?
The spring flagship is held at Tokyo Big Sight. The 2026 edition ran 17–19 March; dates shift year to year.
Is Smart Energy Week free?
Yes, with online pre-registration. Visitors without registration pay admission.
What shows are part of Smart Energy Week?
H2 & FC EXPO, PV EXPO, BATTERY JAPAN, SMART GRID EXPO, WIND EXPO, BIOMASS EXPO and ZERO-E THERMAL EXPO.
Can I get the Smart Energy Week attendee list?
There’s no exportable list. I can build an enriched list of exhibitors and attendee profiles.
Walk into Smart Energy Week with a target list
Exhibiting or just walking the halls, the companies you want to meet at Smart Energy Week are already registered. I can find them, enrich them with titles, company data and LinkedIn profiles, and deliver a file your team can work from straight away.
Related event guides
- SNEC 2027 Guide: Solar Expo Dates, Visitors and Leads
- Tokyo International Gift Show: Buyer Guide for 2027
- HCJ Tokyo Guide: Hotel, Restaurant and Catering Japan Show
Sources
Photo credits
- Cover image: München, Messe Intersolar 2024, 1 by Renardo la vulpo, CC BY-SA 4.0, via Wikimedia Commons.
- In-article image: Tokyo Big Sight @ Ariake (9654330268) by Guilhem Vellut, CC BY 2.0, via Wikimedia Commons.
