[New in 2026] Seiko Astron Nexstar HAD002J｜Radio waves from 5 countries x dual time x retrograde day of the week, navy business watch with high-end functions

Seiko Astron NEXTER (NEXTER) line as a new model in April 2026HAD002Jwill be added.
The equipped movement is Cal.8B63 radio solar. In addition to being able to receive standard radio waves from five countries, it is also equipped with a dual time display function and a retrograde day-of-the-week mechanism, making it one of the most versatile watches in the Nexstar line. While the deep navy dial, pink gold color accents, and pure titanium x diamond shield specifications are the same as its brother model HAD001J, the movement specifications are clearly differentiated.

``I want to be able to manage time differences at hand, not only for everyday business, but also for business trips and travel.'' This is a functional configuration that will especially resonate with those who think so. The biggest reason to choose this model is that it is lightweight at about 93g and has the specs to carry everything.

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.

Functional beauty with a navy dial.

Retrograde day of the week: The design intention resides in the details.

■ Main features

• Equipped with Cal.8B63:Radio solar, average monthly difference of ±15 seconds when not receiving data. Approximately 9 months operation when fully charged
• Radio wave reception in 5 countries:Automatically and compulsorily receives standard radio waves from Japan, China, America, Germany, and the UK.
• World time compatible:Compatible with 25 time zones. Perfect for global business
• Dual time display function:You can check the time in two cities at the same time
• Retrograde day mechanism:Day of the week display that moves in a fan shape. Mechanism that balances visibility and uniqueness
• 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 9 months of operation when fully charged:Approximately 2 years with power save. Peace of mind without worrying 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
• Fully automatic calendar:Automatically manage your calendar until December 31, 2099

■Specs

■ Differences from HAD001J—“Upper functions” added by Cal.8B63

HAD002J and HAD001J are the same navy x pink gold color from the Nexstar line, but they have different movements. While HAD001J is equipped with Cal.8B92 (equipped with radio signals from 4 countries and a stopwatch), HAD002J is equipped with Cal.8B63. The number of countries that can receive the watch has been expanded to five countries: Japan, China, the United States, Germany, and the United Kingdom, and a dual time display and retrograde day of the week mechanism have been added.

Which one you choose depends on the application. If you do not need a stopwatch function and value time difference management and visibility of the day of the week during travel, business trips, and remote work, the HAD002J's functional configuration is more suitable for your actual situation.

■ Dual time and retrograde day of the week—convenience that you will only understand when you use it

The dual time display function allows you to display local time and home time at the same time. Once you get used to this practicality, you won't be able to put it down without having to calculate every time you ask yourself, "What time is it in Japan?" when you're on a business trip overseas. Combined with the world time function that supports 25 time zones, global time management can be easily completed at your fingertips.

The retrograde day of the week mechanism is a unique mechanism in which the day of the week display moves back and forth within a fan-shaped range.通常の回転式インジケーターとは異なる動きが視覚的なアクセントになり、実用性とデザイン性を同時に満たしています。 You can't overlook the fact that it functions as a unique piece that shines on your arm.

■ “Stress-free” operation with radio waves from 5 countries x 9 months on a full charge

Cal.8B63 automatically receives standard radio waves from 5 countries: Japan, China, the United States, Germany, and the United Kingdom, and always maintains accurate time. Maintains high accuracy with an average monthly difference of ±15 seconds even when not receiving data. The battery life is approximately 9 months when fully charged, and approximately 2 years in power save mode.

The design concept of radio-controlled solar, which completely relieves the stress of not having to worry about setting the time or running out of battery, is especially valuable for business watches that are worn every day.

■ Sturdy enough to be used every day: pure titanium x diamond shield

The case and band are made of pure titanium. It is lightweight and has excellent corrosion resistance, and Seiko's unique Diamond Shield coating further increases surface hardness. Weighing approximately 93g, it is light enough for a full metal business watch, so it won't put any strain on your wrists even when you're working at a desk for long periods of time or on the move. The clasp with smart adjuster mechanism allows for fine adjustment of the size without the need for tools, which is directly connected to the comfort of everyday use.

耐メタルアレルギー設計、10気圧防水、ねじロック式りゅうずも備えており、日常のあらゆるシーンで安心して使い続けられます。

■ Recommended for these people

• People who often travel overseas and want to manage time differences smartly
• Business people who want dual time function
• Those who are attracted to the unique display of the retrograde day mechanism
• Those who seek peace of mind with accuracy through radio wave reception in five countries
• Those who want to choose higher-level functions based on the differences with HAD001J
• Those who value the lightness and durability of pure titanium
• Those who want to continue using solar power without worrying about running out of battery
• People looking for an authentic business watch as a present for promotions or milestones

■ Buyer's comment

HAD002J is a brother model of HAD001J, but by incorporating Cal.8B63, dual time and retrograde day of the week have been added, clearly increasing the amount of information on the wrist.出張や旅行の多い方には特に刺さる機能構成で、実際に手に取ると扇形に動く曜日表示のユニークさに驚くお客様が多いです。同じ165,000円で選ぶなら、ストップウォッチよりもデュアルタイムや時差管理が欲しい方はこちらを迷わず選んでほしい一本。 The high texture of titanium x diamond shield is also guaranteed.

— Nanapure Buyer Fujimuro

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