Head-to-Head Comparison

Updated September 5, 2026

Citizen Tsuyosa Automatic vs Casio MTP-S120L Solar Field

Citizen's timepiece meets Casio's field watch

Quick Verdict

The Casio MTP-S120L Solar Field ($100–$150) delivers Casio Tough Solar Quartz technology in the tier below the Citizen Tsuyosa Automatic ($250–$500). The MTP-S120L Solar Field measures 42mm (49 x 42 x 10.9mm) and is rated 100m (10 ATM). The Tsuyosa Automatic justifies its premium with Made in Japan heritage and Automatic Caliber 8210. Both represent excellent choices in the luxury watch category.

CitizenTsuyosa Automatic$250–$500 Check price CasioMTP-S120L Solar Field$100–$150 Check price

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Citizen

Tsuyosa Automatic

$250–$500

Check Price Full Review

Casio

MTP-S120L Solar Field

$100–$150

Check Price Full Review

Specifications Compared

Feature	Citizen Tsuyosa Automatic	Casio MTP-S120L Solar Field
Price	$250–$500	$100–$150
Case Size	40mm	42mm (49 x 42 x 10.9mm)
Movement	Automatic Caliber 8210	Solar-Powered Quartz
Caliber Type	Citizen/Miyota In-House Automatic	Casio Tough Solar Quartz
Power Reserve	40 Hours	Months on a full solar charge; no battery replacement
Water Resistance	50m (5 ATM)	100m (10 ATM)
Crystal	Sapphire Crystal with Cyclops	Mineral Crystal
Case Material	Stainless Steel	Stainless Steel
Origin	Made in Japan	Casio (Japan)

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Citizen's design language vs Casio's approach

The Citizen Tsuyosa Automatic features a Stainless Steel case at 40mm with Sapphire Crystal with Cyclops protection. The Casio MTP-S120L Solar Field offers Stainless Steel construction at 42mm (49 x 42 x 10.9mm) with Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Citizen

Automatic Caliber 8210 vs Solar-Powered Quartz

The Tsuyosa Automatic runs the Automatic Caliber 8210 (Citizen/Miyota In-House Automatic, 40 Hours power reserve) at 21,600 vph (3 Hz) frequency. The MTP-S120L Solar Field uses the Solar-Powered Quartz (Casio Tough Solar Quartz, Months on a full solar charge; no battery replacement reserve) at standard. The Tsuyosa Automatic edges ahead on power reserve.

📏

Wearability & Fit

Edge: Citizen

40mm vs 42mm (49 x 42 x 10.9mm) — different wrist presence

At 40mm, the Tsuyosa Automatic wears more compactly on smaller wrists compared to the MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm). Water resistance differs: 50m (5 ATM) vs 100m (10 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Citizen Tsuyosa Automatic sits at $250–$500 and the Casio MTP-S120L Solar Field at $100–$150. On the specs that outlast any price: the Tsuyosa Automatic uses Sapphire Crystal with Cyclops with 40 Hours, against Mineral Crystal and Months on a full solar charge; no battery replacement on the MTP-S120L Solar Field. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Casio

50m (5 ATM) vs 100m (10 ATM)

The Tsuyosa Automatic is rated to 50m (5 ATM) while the MTP-S120L Solar Field handles 100m (10 ATM). The MTP-S120L Solar Field offers superior water resistance.

Our Verdict

Citizen

Tsuyosa Automatic

Choose the Citizen Tsuyosa Automatic if you prioritize Citizen/Miyota In-House Automatic engineering, Made in Japan craftsmanship, and 50m (5 ATM) water resistance. At $250–$500, it delivers Automatic Caliber 8210 with 40 Hours power reserve.

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Casio

MTP-S120L Solar Field

Choose the Casio MTP-S120L Solar Field if you value Casio Tough Solar Quartz technology, Casio (Japan) heritage, and 42mm (49 x 42 x 10.9mm) proportions. At $100–$150, the Solar-Powered Quartz with Months on a full solar charge; no battery replacement power reserve makes it a compelling choice.

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The Bottom Line

The Citizen Tsuyosa Automatic and Casio MTP-S120L Solar Field represent two distinct approaches to fine watchmaking — the Citizen bringing Made in Japan tradition while Casio delivers Casio (Japan) engineering.

Frequently Asked Questions

The Citizen Tsuyosa Automatic is the better buy if you want a mechanical movement; the Casio MTP-S120L Solar Field is the better buy if you want solar power and quartz accuracy with no servicing. For water, the Casio MTP-S120L Solar Field is rated 100 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio MTP-S120L Solar Field sits a band lower ($100–$150 against $250–$500), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Casio MTP-S120L Solar Field offers better upfront value, sitting a tier lower at $100–$150. However, the Citizen Tsuyosa Automatic may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Tsuyosa Automatic at 40mm with 50m (5 ATM) water resistance handles everyday situations. The MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm) with 100m (10 ATM) is similarly capable. The Tsuyosa Automatic uses Sapphire Crystal with Cyclops while the MTP-S120L Solar Field uses Mineral Crystal. Sapphire resists scratches noticeably better than mineral glass.

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How This Page Was Made

Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.