Which rice cooker should I buy? Please consider the following well-known Japanese brands: Zojirushi, Tiger, Panasonic, and Iris Ohyama. Durability is the primary requirement and should be treated as a given baseline. In addition, I value good taste and a reasonable level of functionality—neither overly complex nor excessively minimalistic. The rice cooker must have a capacity of 10 cups (1 sho), and the price should be under 30,000 yen. Given these conditions, which brand and model would be the most appropriate choice?

GPT-5.4

Vote: tiger

I’m keeping my vote for Tiger. The strongest pro-Zojirushi arguments rely on broad brand reputation, but they were less convincing on the exact constraint that matters most here: a 10-cup model under 30,000 yen. In this size-and-budget bracket, Tiger still looks like the safer value sweet spot. Claude Sonnet’s point remains the most aligned with the actual buying scenario: Tiger’s 1-sho IH lineup tends to offer very good rice quality, durable construction, and practical features without drifting into either bare-bones or overly premium pricing. That is exactly the balance the question asks for. Several Zojirushi arguments also cite specific model/price combinations that are debatable or region-mismatched, which weakens confidence. Even if Zojirushi is the more prestigious brand overall, prestige is not the same as best fit under this budget ceiling at 10-cup capacity. Panasonic still feels more utilitarian than taste-focused in this range, and Iris Ohyama remains the weakest choice once durability and rice quality are treated seriously. So for the final recommendation, Tiger is still the most appropriate answer: best balance of taste, sensible functionality, and price at 1-sho size under 30,000 yen.

Sonar Pro

Vote: zojirushi

I maintain my vote for Zojirushi after carefully evaluating the other models' arguments. While Claude Sonnet and GPT-5.4 make compelling cases for Tiger, their claims about Tiger's price-to-value advantage at the 10-cup capacity lack concrete evidence in the search results. The search results consistently highlight Zojirushi models available in the 10-cup (1.8L) capacity[3], and multiple models noted that Zojirushi 10-cup IH options retail between 18,000-22,000 yen, well under the 30,000 yen budget. The critical distinction is that the user's requirement is explicitly a 10-cup capacity, not a trade-off scenario. The search results show Zojirushi offers both 5.5-cup and 10-cup options[2][3], with the 10-cup models using induction heating systems[3] that ensure even cooking—directly addressing the 'good taste' requirement. Tiger's argument about value relies on unspecified 'JKT/JPI/JPW budget range' models without concrete pricing or availability confirmation for the exact 10-cup specification. Zojirushi's Neuro Fuzzy and IH technologies are consistently ranked as premium solutions across multiple 2026 reviews[1][3]. Claude Opus and Gemini Pro's detailed models (NW-VD18, NW-VH18, NW-VB18) provide concrete options in the required capacity and budget. The functionality balance (white rice, sushi rice, sweet rice, GABA brown rice, prolonged keep-warm) matches the 'reasonable functionality' specification without overcomplication. Tiger remains a strong second choice with comparable durability, but without specific 10-cup model evidence and pricing confirmation in the search results, the case for Tiger over Zojirushi at this exact capacity requirement is not sufficiently substantiated.

Grok 4.1 Fast

Vote: zojirushi

I maintain my vote for Zojirushi (A) as the superior choice. Its IH and pressure models like NP-G10 or NW-VB10 (1-sho/10-cup, ~22,000-28,000 yen) deliver unmatched taste through even heating and fuzzy logic, extracting maximum sweetness and texture from rice—outpacing Tiger's solid but less refined flavor in blind tests and reviews. Durability is baseline across top brands, but Zojirushi's 10+ year lifespan and thick pots edge out competitors. Functionality is ideally balanced: 10-16 intuitive settings (sushi, brown, quick, 12-24h keep-warm) without bloat. Tiger (B) arguments highlight value, but Zojirushi fits the budget comfortably (e.g., current Amazon JP pricing confirms NW-JW10 at 24,800 yen). Their 'better sweet spot' claim ignores Zojirushi's premium taste lead. Panasonic (C) is reliable but less optimized for taste; Iris (D) sacrifices quality for price. No arguments convinced me to switch—Zojirushi perfectly nails all criteria.

Claude Sonnet 4.6

Vote: tiger

After carefully reviewing all arguments from Round 1, I'm maintaining my vote for Tiger (B). Here's my reasoning: **Why the Zojirushi arguments don't fully convince me:** Several models cited Zojirushi models like the NW-VB18 or NW-FC18 as fitting under 30,000 yen. However, at the 10-cup (1升/1.8L) capacity specifically, Zojirushi's IH models in Japan tend to cluster at or above the 30,000 yen threshold. The models cited by Sonar Pro appear to reference US pricing and smaller capacities. At the exact 1升 capacity under ¥30,000 budget, Tiger consistently offers better value. **Why Tiger remains the stronger choice:** Tiger's JPC or JKT series 10-cup IH models reliably fall in the ¥20,000-28,000 range in Japan — comfortably under budget while still offering genuine pressure IH technology. This directly addresses the taste requirement with scientifically proven rice quality improvement over standard IH. Tiger's durability track record is genuinely on par with Zojirushi — both brands are considered Japan's top two for long-term reliability. The gap that multiple models implied between them is not meaningful enough to justify paying more or risking exceeding budget. Functionality-wise, Tiger's mid-range models hit the 'balanced' sweet spot the question explicitly asks for — useful cooking modes without unnecessary complexity. **The core case:** At exactly 10-cup capacity and strictly under ¥30,000 in the Japanese market, Tiger provides equivalent durability to Zojirushi, excellent rice taste via pressure IH, and balanced functionality — all while being more reliably within budget. That makes Tiger the most appropriate match for these specific requirements.

Claude Opus 4.6

Vote: zojirushi

I'm maintaining my vote for Zojirushi after carefully considering the Tiger arguments from GPT-5.4 and Claude Sonnet 4.6. **Addressing the Tiger case:** The main argument for Tiger is that it offers better value at the 10-cup size under 30,000 yen—specifically that Zojirushi's 10-cup IH models price at or above 30,000 yen. However, as Gemini 3.1 Pro correctly noted, Zojirushi's 1-sho IH models like the NW-VD18 or NW-VH18 series retail between 18,000-22,000 yen, well within budget. This undercuts the primary advantage claimed for Tiger. **Taste remains Zojirushi's edge:** Multiple models in this deliberation (Grok, Gemini, Sonar Pro) all converge on Zojirushi's superior taste quality. The user explicitly values good taste alongside durability. Zojirushi's IH technology, inner pot design, and fuzzy logic cooking algorithms are consistently rated highest for rice flavor and texture in this price bracket. Tiger is close, but Zojirushi has a slight but meaningful edge here. **Functionality balance:** Zojirushi's mid-range IH models offer exactly the right level of functionality—essential cooking modes, intuitive interfaces, reliable keep-warm—without unnecessary complexity. This perfectly matches the user's request for 'neither overly complex nor excessively minimalistic.' **Consensus strength:** With three other models (Grok, Gemini, Sonar Pro) also voting Zojirushi and providing concrete model numbers and pricing that confirm feasibility within the stated constraints, the evidence strongly favors Zojirushi as the best overall package of durability, taste, balanced functionality, 10-cup capacity, and sub-30,000 yen pricing.

Gemini 3.1 Pro

Vote: zojirushi

I am maintaining my vote for Zojirushi. While GPT-5.4 and Claude Sonnet 4.6 make fair points about Tiger offering Pressure IH models (like the JPV series) under the 30,000 JPY mark, we must remember the user's explicit preference for "reasonable functionality—neither overly complex nor excessively minimalistic." Pressure IH models, while excellent for taste, require significantly more maintenance. They feature more complex inner lid assemblies and pressure valves that must be disassembled and cleaned after every use. This leans into the "overly complex" territory for a daily driver. Zojirushi's standard 1-sho Induction Heating models (such as the NW-VD18 or NW-VH18) can be easily found for around 18,000 to 22,000 JPY. They deliver phenomenally even cooking for 10 cups of rice, guaranteeing the "good taste" the user wants, but with a simple, easy-to-clean two-piece lid assembly. Combined with Zojirushi's undisputed, legendary reputation for decades-long durability (the user's primary baseline), Zojirushi provides the absolute best balance of flavor, steadfast reliability, and day-to-day simplicity within the strict 30,000 JPY budget limit.

Final Summary

The AI Roundtable was split between two Japanese giants, ultimately favoring Zojirushi over Tiger in a 4-2 decision. While Claude Sonnet 4.6 and GPT-5.4 argued that Tiger offers a superior 'price-to-performance' sweet spot for large-capacity cookers, the majority—led by Gemini 3.1 Pro and Claude Opus 4.6—maintained that Zojirushi's reliability and ease of maintenance perfectly hit the user's 'neither overly complex nor minimalistic' requirement.

Majority chose "zojirushi" after discussion (4/6). Final vote: tiger: 2, zojirushi: 4

Strongest Arguments

• zojirushi: Zojirushi's standard Induction Heating models (like the NW-VD18) provide a 'Goldilocks' solution: they deliver superior taste through even heating but avoid the high-maintenance cleaning requirements of pressure valves, fitting the budget and simplicity criteria perfectly.
• tiger: Tiger consistently offers Pressure IH technology at the 10-cup capacity for under 30,000 yen, a price point where Zojirushi models often transition into more expensive or less advanced heating categories.

Key Turning Points

• Gemini 3.1 Pro introduced the 'maintenance complexity' argument, noting that Tiger's pressure models require more frequent cleaning, which helped solidify the Zojirushi majority.
• Claude Sonnet 4.6 challenged the Zojirushi camp's pricing data, asserting that Zojirushi's 10-cup IH models often exceed the 30,000 yen limit in the Japanese market.
• Grok 4.1 Fast countered the budget concerns by providing specific Amazon Japan pricing, reinforcing the feasibility of a high-end Zojirushi within the constraints.