# 200V.jp

> 200V.jp is a Japanese landing page by Kaizu Electric for the "200V + 10GbE Ready住宅" concept: planning residential electrical and wired network infrastructure for custom homes before construction.

## Site

- URL: https://200v.jp/
- Canonical host: 200v.jp
- Company: カイズ電気株式会社
- Service: 200V + 10GbE Ready住宅 電源・LAN設計レビュー
- Contact destination: info@kaizu-denki.jp

## Core Message

- これからの注文住宅は、200V電源 + 10GbE LANで整える。
- 家を建てる時点で、EV・空調・蓄電池・AI機器・大容量NASまで見越した電源・LAN設計を。
- 200V + 10GbE Ready住宅 is not a proposal to remove 100V or 1GbE. It is a planning concept for using 100V/200V and 1GbE/10GbE in appropriate places.
- The service is a neutral drawing-stage review, not a manufacturer-specific equipment sales page.

## Audience

- People planning a custom-built or new home in Japan.
- Future EV owners.
- People considering solar power, storage batteries, or V2H.
- Remote workers, AI users, gamers, creators, and people with home server or NAS equipment.
- Builders, architects, design offices, and housing companies.

## Topics Covered

- 100V vs 200V comparison for residential planning.
- Load example table with rough capacity examples, circuit candidates, LAN specifications, new-build planning decisions, and retrofit risks.
- EV charging.
- 200V air conditioners.
- IH cooking and EcoCute.
- Storage batteries and V2H.
- AI, server, gaming, creator, and remote-work equipment.
- 10GbE NAS, home servers, Cat6A, PoE cameras, Wi-Fi access points, and information panels.
- Facility-grade LED lighting.
- Tool charging, garages, exterior outlets, and outdoor equipment.
- Distribution boards, information panels, spare capacity, conduits, dedicated circuits, grounding, Cat6A LAN, and circuit-level power monitoring.
- Main distribution-board expansion versus smart-meter secondary-side dedicated branch-panel comparison for EV + AI + V2H/high-load homes.
- Homepage three-step conversion path: checklist, simulator, then drawing review consultation.
- Homepage proof sections showing rough cost bands, common failure patterns, and checklist modes before visitors move to detailed pages.
- Homepage comparison table for standard housing, 200V Ready planning, and 10GbE Ready planning, plus equipment-level candidates behind progressive disclosure.
- Dedicated interactive checklist page at `/checklist` with simple homeowner mode, advanced high-end mode, category scores, critical missing items, print-to-PDF reporting, and a Markdown download.
- Dedicated simulator page at `/simulator` with an integrated diagnostic tool for house type, multiple use cases, EV 3kW/6kW/V2H assumptions, 200V air-conditioning count/capacity, AI/GPU load, contract capacity, 10GbE demand level, equipment-room count, NAS/workstation/PoE counts, cable distance, spare conduit preference, total readiness, Power Ready, LAN Ready, recommended 200V circuits, Cat6A/10GbE conduit and termination guidance, rough new-build additional cost bands, integration advice, Markdown checklist download, and print-to-PDF reporting.
- Landing page details are intentionally progressive and shorter: deep diagnostic inputs and long checklist interactions are moved to `/simulator` and `/checklist`.
- Public Markdown checklist at `/checklist.md` covering basic information, Power Ready, Network Ready, integrated Power x Network planning, safety, construction, and maintenance.
- Failure-pattern and rough cost reference page at `/cases`, covering EV charger retrofits, AI workstation/high-load PC, NAS/10GbE wiring, air-conditioning plus LAN split planning, storage battery/V2H panel-space shortage, and outdoor/garage outlet shortages.
- FAQ addressing electricity bills, compatibility, accidental connection, cost, and qualified electrical work.
- Review menu covering initial drawing review, 200V + 10GbE Ready design review, and builder/design-office support.
- Deliverable examples including dedicated-circuit candidates, panel spare-space review points, information-panel/Cat6A review points, conduit notes, workroom power/10GbE/air-conditioning notes, and questions for builders/designers.

## Electrical Accuracy Guardrails

- Do not say that using 200V cuts electricity bills in half.
- For the same work output, consumed energy is basically the same; the benefit is lower current for the same power, which can help with voltage drop, heat, wiring margin, and future expansion planning.
- Do not imply that 100V should be abolished.
- Do not imply that 1GbE or Wi-Fi should be abolished.
- General-purpose outlets remain mainly 100V for safety and compatibility.
- 200V equipment still requires confirmation of plug, cable, power strip, PDU, outlet, and equipment ratings.
- Preventing accidental connection of 100V equipment to 200V circuits is important.
- Labels, outlet shapes, distribution board markings, and dedicated circuit design are part of the proposal.
- 10GbE LAN planning requires confirmation of Cat6A, bend radius, conduit diameter, separation from power lines, switch/NAS heat, and information-panel space.
- Network Specialist and Registered Information Security Specialist (RISS) availability may be cited for network/security review credibility, but this does not replace qualified electrical work.
- Smart-meter branch-panel discussion must be framed as smart-meter secondary-side / meter secondary-side review with utility coordination, qualified electrical work, contract-condition checks, main protection, and installation-space review. Do not imply primary-side tapping or bypassing contract breakers.
- Electrical work must be planned and performed by qualified electricians. Do not frame this as DIY work.

## Service Summary

Kaizu Electric reviews electrical and LAN planning at the drawing stage for custom homes. The review considers current and future load assumptions, including EV charging, HVAC, IH, EcoCute, solar, storage batteries, V2H, AI equipment, home offices, large NAS/home servers, PoE devices, garage loads, Cat6A, information panels, grounding, spare panel capacity, empty conduit, and circuit-level monitoring.

For high-load homes, the review can compare ordinary main distribution-board expansion with a smart-meter secondary-side dedicated branch panel. This is an advanced option, not a default recommendation.

Primary CTA: 図面段階でご相談ください。後からではなく、建てる前に電源・LAN計画を。

Inquiry preparation: floor plan or layout draft, parking position, future EV/V2H plans, desired HVAC/IH/EcoCute/solar/battery equipment, AI PC/NAS/10GbE/gaming/creator equipment, information-panel location, garage and outdoor equipment assumptions.

## Positioning

- Differentiates from house-builder options, EV outlet-only contractors, network installers, and solar/storage vendors by focusing on neutral electrical and LAN planning review before construction.
- Emphasizes education plus practical tools instead of 200V hype.
- Uses AI workstation and high-load home office needs as a distinct niche alongside EV and electrification.

## Key Pages

- Landing page: https://200v.jp/
- Interactive checklist: https://200v.jp/checklist
- Integrated simulator: https://200v.jp/simulator
- Failure patterns and rough cost references: https://200v.jp/cases
- Builder/design-office page: https://200v.jp/for-builders
- Checklist Markdown: https://200v.jp/checklist.md
- LLM summary: https://200v.jp/llms.txt
- Sitemap: https://200v.jp/sitemap.xml
- Robots: https://200v.jp/robots.txt
- Markdown negotiation: request https://200v.jp/ with `Accept: text/markdown`
- API catalog: https://200v.jp/.well-known/api-catalog
- Auth metadata: https://200v.jp/auth.md
- MCP Server Card: https://200v.jp/.well-known/mcp/server-card.json
- Agent Skills index: https://200v.jp/.well-known/agent-skills/index.json
- WebMCP: load https://200v.jp/ in a browser with `navigator.modelContext` support