Japan

Timing

Japan is one hour ahead of Taiwan, so this is evening to next morning: send by 18:00 JST, ready by 09:00. Rush within four hours covers the whole Japanese working day.

What we price against

• Electrical: the 電気設備技術基準 and its interpretation, the 内線規程 (JEAC 8001), and the licensing split between 第一種 and 第二種電気工事士 work; 分電盤 and 幹線 upgrades, 専用回路 for IH, EV and air conditioning, 漏電遮断器 items.
• Plumbing: 建築基準法 and local 水道局 rules for 給水装置工事 (指定給水装置工事事業者 items), 排水設備, ユニットバス and キッチン replacements with the 設備 and 電気 inside them.
• Air conditioning: standard エアコン取付 line items (配管長, 化粧カバー, 専用回路, 真空引き, 撤去・リサイクル料).
• Format: estimates in the Japanese convention: 見積書 with 工事名, 工期, line items grouped by 工種, 材料費 and 労務費 separated or combined per your custom, 諸経費 as a percentage, 一式 lines where the trade uses them, 消費税 10% and 税込 total.

Suppliers we check

MonotaRO, Cainz, Kohnan and Komeri for retail; 電材 wholesaler and maker list prices (Panasonic, Mitsubishi Electric, LIXIL, TOTO, Rinnai, Noritz, Daikin) with the 掛け率 you tell us; 積算資料 and 建設物価 labor references when you want a published basis.

Units, tax and format

Metric; cable in mm², pipe in A or mm. 消費税 10% as its own line. 見積書, 内訳書 and 数量調書 as separate sheets if you want them, with your 社判 block left blank for stamping. Japanese for the customer, Chinese for your own notes.

Chinese-speaking contractors

Many renovation, electrical and plumbing subcontractors in Tokyo (Ikebukuro, Nishi-Kawaguchi, Kinshicho), Osaka, Nagoya and Fukuoka run Chinese-speaking crews and quote to Japanese general contractors and property managers. We take the job in Chinese and deliver a 見積書 that reads as native Japanese.

Typical jobs

原状回復 and 内装リフォーム for rental units, ユニットバス and キッチン replacements, 分電盤 upgrades and 専用回路, エアコン installs by the batch, 店舗 fit-outs, 民泊 conversions.