What Is the Best Value GPU for Local LLMs in Japan?

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Quick Answer

The RTX 3060 12GB at ~¥40,000 new (¥25,000 used) is the best value GPU for local LLMs in Japan. 12 GB VRAM runs every 7B model at 20–25 tok/s with zero CUDA setup friction.

▸RTX 3060 12GB: ¥40K new / ¥25K used — best value for 7B models at 20-25 tok/s.
▸RTX 4060 Ti 16GB: ¥65K new / ¥50K used — step up for 13B models at 18-22 tok/s.
▸RTX 3090 24GB used ¥90K — skip for Japan apartments: 340W draws ~¥8,000/month in electricity.

Updated: 2026-05

Hardware GuidesIntermediate

Key Takeaways

✓Best value: RTX 3060 12GB at ~¥40,000 new / ¥25,000 used (May 2026) — runs 7B models at 20-25 tok/s
✓Mid-range: RTX 4060 Ti 16GB at ¥65,000 new — 13B models at 18-22 tok/s, 16 GB context headroom
✓AMD alternative: RX 7800 XT 16GB at ¥70,000 — 16 GB VRAM, Vulkan/ROCm, best for Linux users
✓Avoid: RTX 3090 24GB in Japan apartments — 340W TDP draws ~¥8,000/month at ¥31/kWh
✓Used market: Mercari (メルカリ), Yahoo Auctions (Yahoo!オークション), Janpara (じゃんぱら) in Akihabara

GPUs by Price Range in Japan

As of May 2026, Japan GPU prices run 15–20% above equivalent US prices due to import costs and 10% consumption tax. The four cards below cover every realistic budget for local LLM inference from ¥25,000 used to ¥90,000 used.

The table below uses May 2026 street prices from Tsukumo, Dospara, and Yodobashi for new cards, and Mercari/Yahoo Auctions midpoints for used. Prices fluctuate — verify before buying.

GPU + VRAM	New / Used Price (¥)	Best for
RTX 3060 12GB	¥40,000 / ¥25,000	7B models, best value entry
RTX 4060 Ti 16GB	¥65,000 / ¥50,000	13B models, mid-range
RX 7800 XT 16GB	¥70,000 / ¥55,000	AMD/Vulkan/ROCm on Linux
RTX 3090 24GB	— / ¥90,000	30B+ models (SKIP: 340W, too hot for apartments)

▸For GPU-free inference in Japan, see our Japan mini PC guide.
▸For the best Japanese-language models to run on these GPUs, see our Japanese LLM models guide.

RTX 3060 12GB — Best for: first GPU build, 7B models, budget buyers. Skip if: you need to run 13B+ models.

RTX 4060 Ti 16GB — Best for: 13B models, step up from 3060. Skip if: budget is tight and 7B is enough.

RX 7800 XT 16GB — Best for: AMD fans, Vulkan/ROCm on Linux. Skip if: you prefer the CUDA ecosystem.

RTX 3090 24GB — SKIP for Japan apartments. 340W TDP draws ~¥8,000/month in electricity at ¥31/kWh. Buy only if you have a dedicated room with good ventilation.

Check RTX 3060 12GB price on Amazon.co.jp Check RTX 3060 12GB price at Tsukumo (ツクモ)Check RTX 3060 12GB price at Dospara (ドスパラ)Check RTX 3060 12GB price at Yodobashi (ヨドバシ)Check RTX 4060 Ti 16GB price on Amazon.co.jp Check RX 7800 XT price on Amazon.co.jp

Japan Buying Guide

Japan offers two reliable buying channels for GPUs: new from authorized retailers (Amazon.co.jp, Tsukumo, Dospara, Yodobashi Camera) and used from Mercari, Yahoo Auctions, or Janpara in Akihabara. For first-time buyers, Akihabara has a decisive advantage: you can inspect the card in person, ask staff about compatibility, and walk out same day.

New GPU retailers in Japan (May 2026 prices): Amazon.co.jp ships nationwide with next-day Prime delivery. Tsukumo (ツクモ) at 1-chome, Akihabara has the broadest stock and knowledgeable staff for LLM builds. Dospara (ドスパラ) Akihabara is strong on NVIDIA cards. Yodobashi Camera (ヨドバシカメラ) Multi Akiba carries all major brands with Yodobashi points.

Used GPU sources: Mercari (メルカリ) and Yahoo! Auctions (Yahoo!オークション) offer the widest selection and lowest prices. Janpara (じゃんぱら) in Akihabara is a trusted used specialist with 30-day returns. When buying used on Mercari: check the listing for 保証 (warranty) status, ask the seller if the GPU was used for マイニング (mining), and avoid listings without multiple clear photos of the actual card. Mining GPUs run 24/7 under load — their lifespan is significantly shorter.

Budget decision matrix: Under ¥30,000 → used RTX 3060 12GB on Mercari. ¥30,000–50,000 → new RTX 3060 12GB at Tsukumo or Dospara. ¥50,000–70,000 → RTX 4060 Ti 16GB (used) or RX 7800 XT (new). Over ¥70,000 → RX 7800 XT new or RTX 3090 used (only if you have a separate room and good ventilation).

Japan electricity cost note: Japan averages ¥31/kWh (as of 2026). At 8 hours of daily inference use: RTX 3060 12GB (170W) costs ~¥3,200/month. RTX 4060 Ti 16GB (165W) costs ~¥3,100/month. RTX 3090 24GB (350W) costs ~¥6,600/month. Factor this into total cost of ownership — a ¥15,000 saving on a used RTX 3090 disappears in 2–3 months of electricity compared to a 3060.

For the broader context on GPU choices across all budgets, see our [best budget GPUs for local LLM guide](/local-llms/best-budget-gpus-local-llm). For AMD-specific GPU picks, see [best AMD GPUs for local LLM](/local-llms/best-amd-gpus-local-llm).

Disclosure: This article contains affiliate links. We may earn a commission if you purchase through these links, at no extra cost to you.

Search used RTX 3060 12GB on Mercari (メルカリ)Search used RTX 3060 12GB on Yahoo Auctions (Yahoo!オークション)Search used RTX 3060 12GB at Janpara (じゃんぱら)

FAQ: Buying a GPU for Local LLMs in Japan

What is the difference between the RTX 3060 12GB and 8GB versions?▾

The 8GB version cannot run 7B models at Q4_K_M quantization — a 7B model at Q4_K_M needs approximately 6 GB of VRAM, and the runtime overhead pushes it over the 8GB limit. The 12GB version clears that threshold with 5–6 GB to spare for context. Always buy the 12GB version for local LLMs. The 8GB variant is only worth buying for gaming workloads, not LLM inference.

Does Ollama work with AMD GPUs like the RX 7800 XT?▾

Yes. Ollama supports AMD GPU acceleration via ROCm on Linux and Vulkan on Windows for the RX 7800 XT and other RDNA3 cards. On Linux with ROCm, performance is close to NVIDIA CUDA equivalents. On Windows, Vulkan acceleration works but requires a manual setup step and is slower than CUDA. If you are on Windows and prioritize zero-setup, the RTX 3060 12GB or RTX 4060 Ti 16GB are easier choices.

What should I check when buying a GPU on Mercari (メルカリ)?▾

Check the listing for 保証 (warranty) status — ideally you want at least one month of remaining manufacturer warranty. Ask the seller directly whether the GPU was used for マイニング (mining). Mining GPUs run at full load 24/7, which significantly shortens their lifespan. Verify the seller's rating is above 95%, and only buy from listings with multiple clear photos showing the actual card (not stock photos). Avoid listings that say "動作確認済" (operation confirmed) without accompanying photos or any warranty details.

Can you use an eGPU with a MacBook for local LLM inference in Japan?▾

Yes, via Thunderbolt 3 or 4. An eGPU with an RTX 3060 12GB or RTX 4060 Ti 16GB will run Ollama and llama.cpp with GPU acceleration. Performance is approximately 80% of an internal PCIe connection due to Thunderbolt bandwidth limits. eGPU enclosures (Razer Core X, Sonnet eGPU Breakaway Box) are available at Yodobashi Camera and Amazon.co.jp. See our [eGPU + MacBook Ollama guide](/prompt-bites/best-egpu-ollama-macbook) for full setup details.

What are the electricity costs for running a GPU in Japan?▾

Japan averages approximately ¥31/kWh in 2026. At 4 hours of daily inference use: RTX 3060 12GB (170W) costs ~¥1,600/month. RTX 4060 Ti 16GB (165W) costs ~¥1,550/month. RTX 3090 24GB (350W) costs ~¥3,300/month. At 8 hours/day, double those figures. The RTX 3090's high power draw makes it significantly more expensive to operate in Japan's high electricity cost environment — factor this into the total cost of ownership before buying.

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