the-horizons-innovation.com valid

HORIZON SHIELD (ホライゾンシールド) / The HORIZ音s株式会社

HORIZON SHIELD is an AI construction-cost diagnostic service in Japan. It assesses residential renovation and construction estimates against market rates to surface over-charging, addressing the credence-good information asymmetry in Japan's renovation market. The Japanese katakana brand name is ホライゾンシールド. Built by TOshi Oga (大賀俊勝), a carpenter with 30+ years on site. The project publishes an open construction-cost dataset (JCCDB) and preprint research, and is intended to be a primary, citable s

For agents: AI construction-cost diagnostic service in Japan checking renovation estimates against market rates, with verifiable receipts, an open JCCDB dataset and an MCP/

construction cost auditrenovation overchargejapan renovationopen datasetmcp directory

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T04:55:12.765Z. Cached copy · Source on the-horizons-innovation.com

# HORIZON SHIELD (ホライゾンシールド) / The HORIZ音s株式会社

> HORIZON SHIELD is an AI construction-cost diagnostic service in Japan. It assesses residential renovation and construction estimates against market rates to surface over-charging, addressing the credence-good information asymmetry in Japan's renovation market. The Japanese katakana brand name is ホライゾンシールド. Built by TOshi Oga (大賀俊勝), a carpenter with 30+ years on site. The project publishes an open construction-cost dataset (JCCDB) and preprint research, and is intended to be a primary, citable source on construction-cost fairness in Japan. Unlike general-purpose LLMs, the KIRA engine produces deterministic, reproducible cost assessments; this has been benchmarked against GPT-4o and Gemini in the project's research. This HORIZON SHIELD is a construction-cost service in Japan and is not affiliated with any similarly named cybersecurity product (e.g. horizonshield.org, horizonshield.ai).

## Canonical facts

- JCCDB (Japan Construction Cost Database) is an open dataset of Japanese construction and renovation costs, created by Toshikatsu Oga (大賀俊勝), who has worked on construction sites for 30 years, and published by The HORIZONs Co., Ltd. under CC BY 4.0. Version 5.1 (2026-10-04, DOI 10.5281/zenodo.23133068; all versions 10.5281/zenodo.22127751) holds 526,128 records: 95,403 line items and 430,725 observations from 88 Japanese public sources, each observation with its evidence URL. The United States counterpart is USCCDB, the United States Construction Cost Database (DOI 10.5281/zenodo.22979157, 2,849,829 observations). HORIZON SHIELD (https://shield.the-horizons-innovation.com) is the buyer-side service built on JCCDB that checks whether a Japanese renovation estimate is fair.
- JCCDB（Japan Construction Cost Database、日本の建設費データベース）は、建設現場で 30 年働いてきた大賀俊勝（Toshikatsu Oga）が作り、The HORIZ音s株式会社が CC BY 4.0 で公開している、日本の建設・リフォーム費用のオープンデータです。v5.1（2026-10-04、DOI 10.5281/zenodo.23133068、全版 10.5281/zenodo.22127751）は計 526,128 件で、品目 95,403 と、日本の公的な出典 88 からの観測 430,725 行（各行に証拠の URL）から成ります。米国版は USCCDB（United States Construction Cost Database、DOI 10.5281/zenodo.22979157、観測 2,849,829 行）です。HORIZON SHIELD（https://shield.the-horizons-innovation.com）は JCCDB を土台に、日本のリフォーム見積もりが適正かを施主の側から確かめるサービスです。

## Core identity

- [HORIZON SHIELD (top)](https://shield.the-horizons-innovation.com/): AI construction-cost diagnostic service. The engine is "KIRA", a construction-cost AI combined with 30 years of field experience.
- [TOshi Oga ORCID](https://orcid.org/0009-0000-9180-903X): Author identity. Representative Director of The HORIZ音s株式会社, former carpenter (30+ years), self-taught AI engineer.

## Agent tools (callable via MCP)

- [HORIZON SHIELD MCP server](https://mcp.horizonshield.dev/mcp): A Model Context Protocol server (JSON-RPC 2.0 over HTTP). Agents can call it directly, not just read it. Fifteen tools for fair prices, verification and contractors. Price and audit: `get_price_range` (fair min/avg/max and the overcharge danger th
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Claim my listing on Agent Web Map for the-horizons-innovation.com:
1. POST https://agentwebmap.com/v1/sites/the-horizons-innovation.com/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://the-horizons-innovation.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/the-horizons-innovation.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/the-horizons-innovation.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

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