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TSUKUMO / Yamada Denki
株式会社ヤマダデンキ
A Japan-based PC manufacturing and assembly partner that combines Akihabara-born PC parts expertise with domestic assembly and inspection, supporting high-quality BTO PCs from one unit depending on the project. TSUKUMO should be treated not as an independent OEM company, but as a store brand of Yamada Denki Co., Ltd. Public information does not clearly confirm third-party brand OEM/ODM contract manufacturing, but eX.computer's domestic assembly, inspection, shipment, full model customization, operation testing, and track record with corporate, education, and research users make it a strong candidate for high-performance PC projects where stable operation and optimized configuration matter, including gaming, creator, CAD/CG, R&D, and workstation use. Rather than a mass-production OEM, it is best positioned as a small-lot, purpose-specific domestic BTO partner focused on expert specification support and quality checks.
Order overview
- Minimum order
- 0-100 units
- Sample
- Custom quote
- Lead time
- 2-4 weeks
Terms vary by specifications and quantity. Confirm current details when inquiring.
Items and categories
Order fit
Supported products
- BTO PCs, desktop PCs, gaming PCs, and creator PCs
- High-performance PCs and workstations for CAD/CG, R&D, simulation, and video production
- Purpose-specific PC configuration proposals for companies, schools, and research institutions, plus server and workstation assembly consultation
Best for
- Labs, educational institutions, public-sector buyers, and corporate IT teams that need stable domestic BTO PCs configured around use case, budget, and performance requirements
- Projects where GPU, CPU, memory, and cooling optimization directly affects results, including gaming, streaming, video production, 3D CG, CAD, and simulation
- Buyers who prioritize domestic assembly, domestic inspection, one-unit validation, and smoother corporate or public-fund purchasing over overseas mass-production OEM routes
Checks before inquiry
- Public information does not clearly state third-party brand OEM/ODM contract manufacturing. Always confirm logo changes, chassis customization, BIOS settings, custom packaging, warranty name, and contracting entity.
- Factory address, monthly capacity, line count, equipment model numbers, and standard production lead time are not public. For multi-unit deployments or rush projects, confirm inventory, configuration, inspection scope, and shipping schedule in advance.
- The fit is strong for BTO PC bodies and assembly, but public evidence is insufficient for contract manufacturing of peripherals such as keyboards, mice, headphones, or speakers, so confirm scope by product.
Lot guidance
Business BTO models are confirmed as available from one unit. Large deployments, multiple units with the same configuration, third-party brand OEM/ODM availability, and monthly production capacity are not publicly confirmed and should be checked per project.
Sample terms
A formal sample program is not publicly confirmed. If purchasing one evaluation unit, timing will likely follow standard BTO lead times, so confirm evaluation-unit pricing, loaner availability, return conditions, and configuration-change terms at the first discussion.
Service scope
See which stages are available from planning through delivery.
Planning and design proposal
Supported
Sample development and testing
Needs confirmation
Material and packaging sourcing
Supported
Mass production and processing
Supported
Quality, certification, and labeling
Needs confirmation
Packing, kitting, and logistics
Supported
Quality and certifications
eX.computer products are confirmed as assembled, inspected, and shipped from a domestic factory, with operation testing across models and quality inspection emphasized for business users. Confirmed PC stability-related checks include memory testing, hardware recognition checks, post OS/driver installation checks, comprehensive stress testing, and optional 12-hour load testing. However, ISO 9001 status for the TSUKUMO BTO factory, full versus sampling inspection details, third-party inspection availability, and the applicable scope of ISO 14001 / ISO 27001 should be confirmed during inquiry.
Certifications
Not confirmed in public information
Sustainability
Not confirmed in public information
Published information may include supplier-provided or operator-verified details. Confirm specifics during your inquiry.
Track record
Past clients
東京大学, 京都大学, 大阪大学, 北海道大学, 国土交通省, NHK, 理化学研究所, JAXA, 産業技術総合研究所
Production countries
Japan
Equipment and materials
Manufacturing equipment and resources
Show 3 more
Supported materials
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