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The Citizen Tsuyosa NJ0150-56A and Casio Edifice EFK-100YD-7AJF are automatic, date-equipped watches with sapphire crystals and steel bracelets, but they make different trade-offs. The Tsuyosa lists a 40 mm case and 42-hour power reserve; the cited EFK-100 is 39 mm wide, measures 43.5 mm long and 12.5 mm thick, and has approximately 40 hours of reserve. Their water-resistance ratings also differ: 50 m for the Citizen and 10 bar for the Casio. Which is the better fit depends on the exact variant, your wrist and intended use—not a universal winner.
At a glance: Tsuyosa NJ0150-56A vs. EFK-100YD-7AJF
This comparison uses two specific white-dial references: Citizen’s NJ0150-56A and Casio’s EFK-100YD-7AJF. Specifications should not automatically be applied to every model in either family.
| Specification | Citizen Tsuyosa NJ0150-56A | Casio Edifice EFK-100YD-7AJF |
|---|---|---|
| Case dimensions | 40 mm case width | 43.5 × 39 × 12.5 mm |
| Weight | Not stated on the cited Citizen product page | 148 g |
| Movement | Automatic Caliber 8210 | Automatic, with manual winding |
| Power reserve | 42 hours | Approximately 40 hours |
| Water resistance | 50 m / 5 bar | 10 bar |
| Crystal | Sapphire | Sapphire |
| Display and functions | Three hands and date | Date; hacking function listed |
| Stated accuracy | Not stated in the cited product-page facts | -35 to +45 seconds per day |
Sources: Citizen’s official NJ0150-56A listing and Casio’s official EFK-100YD-7AJF listing.
Which case is likely to suit your wrist?
Citizen: a 40 mm case
Citizen lists the NJ0150-56A as a 40 mm case. That gives a useful width reference, but the listed figure alone does not establish how the watch will sit on a particular wrist; the cited product facts do not provide a comparable full set of case dimensions.
#1 Best Overall
- The "Tsuyosa" Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist. Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet.
- Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray black dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic. Powered by an automatic movement and offering up to 50 meters of water resistance, the refined timepiece is a daily wearing choice ready for work, play, and everything in between. Caliber 8210.
- 3 Hand with Date, Automatic, 42 Hour Power Reserve
- Sapphire Crystal
- 50M Water Resistant and 5 Year Limited Warranty
Casio: 39 mm wide, but 43.5 mm long
The EFK-100YD-7AJF measures 43.5 mm long, 39 mm wide and 12.5 mm thick, and weighs 148 g. Its narrower width does not tell the whole fit story: length and thickness also affect how a watch wears. If possible, try it on or compare those measurements with a watch you already find comfortable.
Movement, winding and reserve
The Tsuyosa NJ0150-56A uses Citizen’s automatic Caliber 8210 and has a stated 42-hour power reserve. Casio lists the EFK-100YD-7AJF as an automatic watch with manual winding and an approximately 40-hour reserve. These are manufacturer-stated specifications, not a direct performance test. Casio also lists a daily rate of -35 to +45 seconds; the cited Citizen product-page facts do not give a comparable accuracy figure.
Rank #2
- The "Tsuyosa" Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist. Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet.
- . Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray green dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic. Powered by an automatic movement and offering up to 50 meters of water resistance, the refined timepiece is a daily wearing choice ready for work, play, and everything in between. Caliber 8210.
- 3 Hand with Date, Automatic, 42 Hour Power Reserve
- Sapphire Crystal
- 50M Water Resistant and 5 Year Limited Warranty
Water resistance: 50 m versus 10 bar
Citizen rates this Tsuyosa reference at 50 m (5 bar) and describes the rating as suitable for swimming in still water. Casio lists 10 bar for the cited EFK-100. Neither rating makes these watches dive watches, and water resistance is not a guarantee against damage in every circumstance. Follow the manufacturers’ guidance for your model and do not operate the crown underwater.
Crystal, date and design differences
Both cited references have sapphire crystals and date displays, along with steel bracelets. The Tsuyosa listing specifies a three-hand display; Casio lists a hacking function for the EFK-100YD-7AJF. The watches differ in case shape, dial design and bracelet details, so photographs and listings should be checked against the exact reference rather than treated as representative of every Tsuyosa or EFK-100.
Rank #3
- The Tsuyosa Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist.
- Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet. Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray yellow dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic.
- Powered by an automatic movement and offering up to 50 meters of water resistance.
- The refined timepiece is a daily wearing choice ready for work, play, and everything in between.
- Caliber E011.
Variants and prices
Casio’s Japanese release dated June 16, 2025 announced several EFK-100 versions with different colors and materials. Its suggested Japanese launch prices were:
| Reference | Japanese suggested launch price |
|---|---|
| EFK-100YD-2A, EFK-100YD-3A and EFK-100YD-7A | ¥49,500 each |
| EFK-100YCD-1A | ¥55,000 |
| EFK-100XPB-1A | ¥74,800 |
These are historical Japanese suggested prices announced by Casio, not current local retail prices or confirmation of present availability. The EFK-100YD-7AJF in the specifications above is the Japanese-market reference corresponding to the cited white-dial listing. Citizen’s regional listing and retailer prices can change; check the exact reference and local availability before buying. Casio’s announcement is available at Casio’s June 16, 2025 release.
Rank #4
- The TSUYOSA Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist
- Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet
- Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray orange dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic
- Powered by an automatic movement and offering up to 50 meters of water resistance, the refined timepiece is a daily wearing choice ready for work, play, and everything in between
- Caliber 8210
A Fratello head-to-head published August 3, 2025 framed the watches as competing in a similar sub-€300 segment. That was the article’s framing at publication, not a current price quote. See Fratello’s comparison.
Which automatic watch should you buy?
Choose the Tsuyosa if its specifications and style fit you
- You prefer the NJ0150-56A’s 40 mm case and white-dial design.
- You value its listed 42-hour reserve and 50 m water-resistance rating.
Choose the EFK-100 if its features and variants appeal more
- You prefer the cited model’s 39 mm width, while taking its 43.5 mm length and 12.5 mm thickness into account.
- You want the listed manual-winding capability, approximately 40-hour reserve and 10-bar rating.
- You are choosing among the broader EFK-100 family’s dial and material variants.
Before deciding, compare the exact reference, case fit, bracelet fit, dial and current price in your region. The specifications help narrow the choice; they do not establish which watch is more comfortable or better in everyday use.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
