Casio G-Shock Solar Atomic AWG-M100 (AWG-M100, AWG-M100S). Current Prices, JDM Listings, Market Analysis

The Casio G-Shock Solar Atomic AWG-M100 is a solar-powered, radio-synchronized G-Shock that sits comfortably in the utility-focused end of the G-Shock lineup. Tonbo tracks it because it moves regularly through the Japanese secondary market, where clean examples surface at prices that often undercut US retail and resale channels. The AWG-M100S is the variant designation most commonly encountered alongside the base AWG-M100 reference. At a current US median of $140, it occupies a practical price point for buyers who want atomic timekeeping without spending on a more premium G-Shock tier.

Current US Market Value

The current US median for the Casio G-Shock Solar Atomic AWG-M100 sits at $140, with the middle 50% of transactions falling between $110 and $180. That range reflects real variance in condition and seller channel rather than model volatility. One important caveat applies here: the AWG-M100 price data is drawn from a sample of only three transactions, and the comp quality rating is 🟠 Estimate only. That means the figures are directionally useful but should not be treated as a deep statistical picture. As more sales data accumulates, the confidence level will improve. For now, treat $140 as a reasonable reference point rather than a hard market anchor.

Active JDM Listings

The most recent two-week window in Japan shows consistent AWG-M100 for sale activity on Yahoo Flea, with three listings appearing on the same day in mid-June. Prices are tightly clustered, and two of the three sellers specifically noted no noticeable scratches or stains, which is a meaningful condition signal on a platform where condition language is often minimal. This kind of clustering suggests healthy supply at the moment.

• Jun 15 on Yahoo Flea: ¥15,000, listed as new
• Jun 15 on Yahoo Flea: ¥14,879, seller noted no noticeable scratches or stains
• Jun 15 on Yahoo Flea: ¥14,700, seller noted no noticeable scratches or stains

All three listings landed within a ¥300 spread, which points to a fairly settled local floor price for clean examples right now.

Recent Alert History

No strict or opportunity alerts have fired for the AWG-M100 in the past 90 days. That is an honest read of the data, not an omission. It likely reflects the combination of a thin US comp base and a stable Japan supply picture where listings have not dipped far enough below the US reference price to trigger a signal. As the comp quality improves and more US transactions are recorded, the alert thresholds will sharpen. You can see how Tonbo's signal logic works across the broader tracked catalog at tonbomarket.com/signals.

Japan vs. US Price Gap

At current exchange rates, the three June listings are landing in the $95 to $100 range landed in Japan before shipping and any import considerations. Against a US median of $140 and a low end of $110, that gap is real but not dramatic. It is wide enough to be interesting for buyers willing to buy AWG-M100 Japan directly, but not so wide that it represents an obvious arbitrage situation. The main risk factor here is comp thinness on the US side. With only three reference transactions, the $140 median could shift meaningfully as more sales are recorded, which means today's apparent gap could look different in three months. Condition variance on flea market platforms adds a secondary layer of uncertainty, even when sellers use positive condition language.

Track Casio G-Shock Solar Atomic AWG-M100 on Tonbo

Tonbo monitors JDM platforms for the AWG-M100 and surfaces price movements, new listings, and cross-market gaps in one place. The Collector tier is free to start at tonbomarket.com/dashboard and includes a five-model watchlist with no credit card required. If you want real-time Discord alerts when a deal-tier listing appears, the Member tier runs $10 per month. For buyers who want a broader look at current value opportunities across the full tracked catalog, tonbomarket.com/deals shows where gaps are widest right now. Nothing is gated to pressure you into upgrading. The free tier is genuinely useful for casual tracking, and the paid tier is built for buyers who want to move quickly when a listing drops.