[New in 2026] Seiko Astron Nexstar HAD001J | Radio-controlled solar x titanium x 25 time zones, the definitive edition of an authentic business watch

The long-awaited new product from Seiko Astron's NEXTER line will be released in April 2026.
Product numberHAD001Jis a flagship grade business watch equipped with Cal.8B92 radio solar. With a deep navy dial, pink gold color accents, and a pure titanium case with a diamond shield coating, this model combines functionality and beauty at a high level.

Compatible with world time in 25 time zones around the world, and has a radio wave correction function that automatically corrects the time by receiving standard radio waves from Japan, China, the United States, and Germany.There are not many reliable partners for business people who work globally. The lightness and high-quality texture of titanium will take your everyday business situations to the next level.

The moment you put it on your arm, it elevates its status.

A piece that makes a picture even if you line it up or look at it.

The depth and elegance of the navy dial.

Astron's pride lies in the details.

■ Main features

• Equipped with Cal.8B92:Radio solar, average monthly difference ±15 seconds (when not receiving)
• World time compatible:Compatible with 25 time zones. Perfect for global business
• Radio wave correction function:Automatically/compulsorily receives standard radio waves from Japan, China, America, and Germany.
• Pure titanium case + diamond shield:Seiko's unique hard coating that is lightweight and scratch resistant
• Sapphire glass:Excellent visibility with super clear coating
• Clasp with smart adjuster:One-push three-fold method allows fine adjustment without tools
• Approximately 6 months operation when fully charged:Approximately 2 years with power save. No need to worry about running out of battery
• 10 ATM waterproof:Reinforced waterproofing for daily life so you can feel safe around water
• Equipped with Lumibrite:The hands and indexes are easy to see even in the dark
• Metal allergy resistant:Designed with consideration for those concerned about metal allergies
• Equipped with stopwatch:1/5 second measurement/60 minute meter. Suitable for everything from business to sports scenes
• Fully automatic calendar:Automatically manage your calendar until December 31, 2099

■Specs

■ “Sense of security” provided by radio solar and world time

Cal.8B92's greatest strength is its radio wave correction function that automatically receives standard radio waves from Japan, China, the United States, and Germany, and constantly corrects the time to be accurate. Even when not receiving data, it maintains high accuracy with an average monthly difference of ±15 seconds. The battery life of approximately 6 months when fully charged and approximately 2 years in power save mode is a great advantage for those who do not want to worry about the hassle of replacing batteries.

World time supports 25 time zones. If you're a business person who frequently travels overseas or makes international calls, you won't be able to do without the convenience of being able to instantly check the local time. Completely freeing yourself from the stress of ``forgetting to set the time'' or ``the battery was dead'' - that's one of the reasons why you choose Astron Nexstar.

■ The strongest combination of pure titanium and diamond shield

The case and band are made of pure titanium. It is approximately 40% lighter than stainless steel, yet has excellent strength and corrosion resistance. Weighing approximately 90g, it is light enough to be used as a full metal business watch. It won't put any strain on your wrists even when you work at a desk for long periods of time or move around a lot.

Furthermore, by applying Seiko's proprietary "Diamond Shield" coating, the surface hardness is greatly improved. Its resistance to everyday scratches is significantly increased, allowing it to maintain its beautiful condition for a long time. The lightness of titanium and the hardness of Diamond Shield - this combination is the most suitable design for businessmen who want to use it hard.

■ Smart adjuster changes “wearing comfort”

The "smart adjuster mechanism" used in the clasp is a unique mechanism that allows you to fine-tune the length of the band in approximately 1 mm increments without tools. You can easily adjust the size on a daily basis at any time, such as due to seasonal swelling of the wrist or interference with the sleeves of a suit. The band can be adjusted to a wide range of sizes up to 185mm.

Case size is 47mm long x 41.5mm wide x 11mm thick. While it has a strong presence, it has a good balance that fits naturally into the cuff of a suit. It's a piece that occupies an exquisite position in the business scene: ``not too big, not too small.''

■ The dignity and visibility of the navy dial

The dial of HAD001J is a deep navy. Pink gold color accents are subtly inserted to create a dignified and mature look. Navy, which is not just blue but changes its appearance depending on the way the light hits it, is a choice that combines dignity for business settings and versatility for off-duty wear.

The hands and indices are equipped with Lumibrite, making them easy to read at night or in dark indoor spaces. The sapphire glass is coated with a super clear coating to reduce glare and maximize the beauty of the dial. I think the most unique feature of this model is that it is not only a functional watch, but also a watch that you want to look at.

■ Recommended for these people

• Business people looking for a full-fledged radio-controlled solar watch
• People who need World Time for overseas business trips or international business
• Those who value the lightness and durability of titanium materials
• Those looking for a dressy watch with a navy dial
• Those who want to continue using solar power without the hassle of replacing batteries
• Those concerned about metal allergies
• Those who are thinking of gifts for milestones such as promotions, employment, retirement, etc.
• Those who want to try Astron's multi-functions

■ Buyer's comment

Astron Nexstar is the line that I personally recommend most as "Astron for everyday use." HAD001J in particular has an exquisite color scheme of navy x pink gold, and I like how it goes well with both suits and casual wear. The combination of titanium and diamond shield is extremely scratch resistant, which is especially reassuring for those who want to use it every day. The time is set automatically using radio waves, and the smart adjuster makes it comfortable to wear.This is a watch that we can confidently recommend as a gift for working men.

— Nanapure Buyer Fujimuro

■ Purchase at each mall

■ Related model (Astron)

• Astron See list
• See the NEXSTAR series list

■ Consult on LINE