Nanoflare 400
Model NF-400
Price history
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Nanoflare 400: Yonex Japan’s Japan-made Nanoflare for intermediates, listed since 2020
The longest-serving Nanoflare in Japan’s line
The Nanoflare 400 (item code NF-400) is a Japan-made, Japan-only Nanoflare that Yonex Japan put on sale in mid-December 2020 at ¥16,000 before tax. Yonex’s line for it is “outstanding maneuverability and an easy flight of the shuttle,” and its level chart rates it best (◎) for intermediate men and women, with a second mark (○) for women beginners. It is still in Yonex Japan’s 2026 catalog in its two launch colors, which makes it the oldest model in that catalog’s Nanoflare range apart from the junior racquet.
Sonic Flare and M40X in a 4U frame
At launch Yonex Japan listed the frame as high-elastic carbon, Toray’s M40X and high-elastic carbon, with a high-elastic carbon shaft and a built-in T-joint; its 2026 catalog lists high-strength carbon, M40X and high-elastic carbon in the frame and keeps the shaft. The page credits the series’ Sonic Flare System, M40X and the Isometric head, with an aero frame shape, a new grommet pattern, Solid Feel Core, a Super Slim shaft and the Control Support Cap. Yonex sells it in 4U only (average 83 g) with grips 5 and 6, 10 mm longer than a standard racquet, and recommends 18–23 lb. Yonex gives no flex rating, and the page prints no balance word; the balance gauge in its 2024–26 Japanese catalogs places the 400 well to the head-light side.
No named player
No Yonex source names a player using the Nanoflare 400. Yonex Japan rates it for intermediate players, and its product pages and catalogs cite no professional user.
Two colors and its Japan-line neighbors
Yonex has sold the 400 in two colors from launch to its 2026 catalog: Snow White (color code 435) and Deep Purple (751), with no limited edition. When it arrived, Yonex Japan’s Nanoflare list ran 800 LT, 800, 700, 600, 400, 200 and Junior; the 600 and 200 had left it by 2023. Today it sits between the Nanoflare 70 of November 2021, a Japan-made 4U with Super HMG and VDM in the frame, rated for intermediate and advanced players, and the Nanoflare 300 of February 2023, the Japan-made beginner model with a plain carbon shaft. The Taiwan-made Nanoflare 111 joined below them in 2024. The Nanoflare 200, 300 and 600 have their own pages.
Six years on Yonex Japan’s list
The 400 is in production and sold only in Japan. Yonex Japan’s product pages carried it from its launch, its 2024, 2025 and 2026 catalogs include it, and Yonex’s Japanese online shop listed it in October 2026. The 2026 catalog prints ¥20,900 including tax. Yonex’s global site and Yonex USA’s catalogs do not list it, so copies outside Japan are imports. Yonex marks it as passing the Japanese national association’s equipment test, so it can be used in sanctioned play in Japan. No verified sales are recorded yet.
Mix-ups, not fakes
No counterfeit of the Nanoflare 400 is documented. The likelier confusion is with the Nanoflare 300, which matches its origin, 4U weight and length, and with the earlier Nanoflare 600, sold worldwide from 2019, which used the same grommet set. The item code, the Snow White or Deep Purple finish and the Made in Japan origin identify a 400; the callout lists the details.
A long-running intermediate frame
The 400 is a current, mass-produced racquet with no documented player, edition or production end. Its interest is its run: a Japan-made head-light frame with the series’ M40X and Sonic Flare System, kept in the same two colors for six years while the Nanoflares around it changed.
Yonex’s item code is NF-400. Check for a Made in Japan origin, a 4U label (average 83 g, grip 5 or 6) and a frame 10 mm longer than standard. The two colors are Snow White (435) and Deep Purple (751). Yonex lists M40X and high-elastic carbon in the frame, a high-elastic carbon shaft and a built-in T-joint. Yonex Japan’s dedicated grommet set for it is AC416NFA, and the racquet comes with a soft case. A frame coded NF-300 (Navy/Pink, Ice Blue, White/Turquoise, White/Salmon Pink or Black/Green) is the Nanoflare 300, and one coded NF-111 or marked Taiwan is the Nanoflare 111.
This is a current racquet, so buyers will find it new in Japan or as an import. Yonex recommends 18–23 lb and suggests Nanogy 98 for hard hitters and Skyarc for control players. For a used frame, confirm the NF-400 code, the Made in Japan marking, the 4U label and one of the two colors, and ask for daylight photographs of the shaft markings and the head. Its interest is as Yonex Japan’s long-running intermediate Nanoflare, not any professional record.