Table Mark's Prepared Rice RT 3P delivers genuinely impressive Japanese rice straight from the microwave, with a texture and flavor that comes remarkably close to a fresh pot of Koshihikari. At $7.99 for a 3-pack from Tomato Japanese Grocery, it's a reliable pantry staple for anyone who wants authentic Japanese rice without the 45-minute commitment of cooking from scratch.

What It Is

The Table Mark Prepared Rice RT 3P is a set of three individually sealed trays of pre-cooked Japanese rice, totaling 21.16 oz (roughly 600g). Each tray is shelf-stable, meaning it can sit in your pantry at room temperature until you're ready to eat. When hunger strikes, you simply peel back the film, pop the tray in the microwave for about two minutes, and you've got a bowl of steaming white rice ready to go. Alternatively, you can boil the sealed tray for about 14 minutes if a microwave isn't available.

TableMark manufactures this rice at its factory in Uonuma, Niigata Prefecture, a region that serious rice lovers will recognize immediately. Uonuma is widely considered Japan's finest rice-growing area, and its Koshihikari rice has earned the Japan Grain Inspection Association's highest "Special A" taste ranking for more than 25 consecutive years. That pedigree matters. TableMark isn't just any food company, either; they hold the number one market share in Japan for frozen udon noodles, so they know a thing or two about producing Japanese staple foods at scale without sacrificing quality.

Who It's For

This product fits a surprisingly wide range of situations. If you're a busy home cook who regularly prepares Japanese meals but doesn't always have time to wash, soak, and steam rice, these trays are a genuine time-saver. College students craving a proper bowl of rice in their dorm room will appreciate the simplicity. Parents assembling quick bento boxes on school mornings can have perfectly cooked rice ready before the coffee finishes brewing.

It's also worth noting the emergency preparedness angle. Because the trays are shelf-stable at room temperature, they work well as part of a "rolling stock" strategy: keep a few packs in the pantry, use them as needed, and replace them periodically. Given recent supply-chain pressures on Japanese rice (Japan released over 90,000 metric tons of emergency rice reserves in May 2025 to address domestic shortages), having a reliable stash of quality rice on hand feels more practical than ever.

How It Performs

The standout quality here is texture. TableMark uses a proprietary two-stage cooking method: pressure heating followed by steam cooking, performed directly inside each individual tray. The result is rice that's plump and glossy, with a satisfying chewiness on the inside and a soft, fluffy exterior. It genuinely resembles freshly cooked rice rather than the mushy, slightly stale texture you might expect from a shelf-stable product.

Flavor-wise, the rice has a clean, subtly sweet taste that's characteristic of good Koshihikari. It pairs naturally with everything from a simple splash of soy sauce and a fried egg to more elaborate dishes like curry rice, donburi, or ochazuke. I found it worked particularly well as a base for onigiri; the grains held together nicely without being overly sticky.

The two-minute microwave time is accurate and consistent. The trays heat evenly, and I didn't encounter any cold spots or dried-out edges, which can be a problem with cheaper instant rice products. The portion size per tray (roughly 200g of cooked rice) is appropriate for one serving as a side, though heartier appetites might want to heat two trays for a main-course portion.

Pros

• Exceptional texture and flavor for a shelf-stable product, thanks to TableMark's two-stage pressure and steam cooking process
• Sourced from Uonuma, Niigata Prefecture, one of Japan's most celebrated rice-growing regions
• Ready in about two minutes in the microwave, with a boiling option for situations without microwave access
• Shelf-stable at room temperature, making it ideal for pantry stocking and emergency preparedness
• Individually portioned trays reduce waste and allow you to prepare exactly what you need
• Backed by TableMark's strong manufacturing reputation (Japan's top frozen udon brand)

Cons

• At $7.99 for three servings (roughly $2.66 per tray), it's noticeably more expensive per serving than cooking rice from a bag
• Some competing retailers offer the same product for less ($6.49 at certain online stores), so price-sensitive shoppers may want to compare
• The individual tray size (about 200g) may feel small for those accustomed to larger rice portions
• Single-use plastic trays generate more packaging waste than cooking a batch of rice in a pot or rice cooker
• Limited variety; this is plain white rice only, with no brown rice or mixed grain option in this particular pack

Value and Pricing

At $7.99 for three trays, you're paying a premium for convenience and quality. A 5-pound bag of dry Koshihikari rice will yield far more servings at a lower per-serving cost, so this product isn't meant to replace your rice cooker entirely. Think of it as a complement: something you keep on hand for nights when cooking from scratch isn't realistic, or for situations where portability and speed matter most.

It's worth mentioning that some online competitors list this same 3-pack at $6.49, so Tomato Japanese Grocery's price sits a bit higher. That said, shopping with a trusted, family-owned store that has over 20 years of experience sourcing authentic Japanese products carries its own value, especially when it comes to proper storage and handling of food items. Tomato's eco-friendly, handle-with-care shipping practices also help ensure the product arrives in good condition if you're ordering online.

How It Compares

The instant rice category has grown significantly in the US, with microwaveable pouches and cups accounting for over 44% of the market's packaging share. Within that crowded field, Table Mark stands out for its Japanese provenance and manufacturing quality. Many American instant rice brands use parboiled long-grain rice that cooks quickly but lacks the sticky, tender character of Japanese short-grain varieties. Table Mark's product tastes distinctly Japanese, which is exactly what you want if you're building a meal around Japanese flavors.

Consumer reception has been positive. On one major Asian grocery e-commerce platform, the same 3-pack holds a perfect 5.0-star rating from 13 reviews, with over 60 units sold. That's a small sample, but the consistency of the praise (particularly around texture and convenience) aligns with my own experience.

The Verdict

Table Mark's Prepared Rice RT 3P does exactly what it promises: it delivers rice that tastes and feels like it just came out of a quality rice cooker, with nothing more than a microwave and two minutes of patience. The Uonuma, Niigata pedigree is real, and you can taste it. Yes, you'll pay more per serving than cooking from a bag, and the single-use trays aren't the most environmentally friendly option. But for the convenience, consistency, and genuine quality on offer, this is one of the best instant rice products available in the US. Keep a few packs in the pantry. You'll reach for them more often than you expect.