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Filename Rules
These filename parts and accounting examples assume Japanese bookkeeping terminology for sole proprietors or side businesses.
Standard Format
YYYY-MM-DD-content-vendor-note-amount-勘定科目[-メモ].ext
Parts
| Part |
Language |
Rule |
Examples |
| Date |
- |
YYYY-MM-DD（サービス利用日） |
2026-04-04 |
| Content |
English |
Short transaction type |
print, transfer, purchase, transport, subscription, shipping, service, fee, rental |
| Vendor |
English |
Abbreviated company name |
nikko, amazon, adobe, rakutravel |
| Note |
English |
Event name etc. (optional) |
tbf20, c105 |
| Amount |
Digits |
No yen sign, no commas |
155380 |
| Account |
Japanese |
Accounting category |
印刷費, 事業主借 |
| Memo |
Japanese |
Event name + description (optional) |
技術書典20大阪東京バス |
Date Rule
Use the service date（乗車日・購入日・利用日）, not screenshot date or settlement date.
Foreign Currency
When the JPY total is unavailable, prefix the amount with the lowercase currency code and encode its minor units: usd-1234 means USD 12.34, not JPY 1,234. For another currency, confirm its minor-unit scale rather than assuming two decimals. Record the human-readable currency/amount and encoding in the memo; leave JPY conversion pending card-statement reconciliation.
YYYY-MM-DD-subscription-vendor-plan-usd-1234-通信費-領収書.pdf
YYYY-MM-DD-subscription-vendor-plan-usd-1234-補助画像-請求書.pdf
Content Vocabulary
| English |
Meaning |
| print |
印刷・製本 |
| transfer |
銀行振込 |
| purchase |
物品購入 |
| transport |
交通（バス・電車・飛行機） |
| subscription |
サブスク・月額サービス |
| shipping |
送料・配送 |
| service |
サービス利用料 |
| fee |
手数料 |
| rental |
レンタル・リース |
Common Accounting Categories
| Category |
When to use |
| 印刷費 |
Printing, bookbinding |
| 外注費 |
Outsourced work |
| 消耗品費 |
Supplies under 100,000 yen |
| 通信費 |
Internet, phone, server |
| 旅費交通費 |
Transportation, accommodation |
| 新聞図書費 |
Books, reference materials |
| 広告宣伝費 |
Advertising, promotion |
| 支払手数料 |
Bank transfer fees etc. |
| 事業主借 |
Reimbursement: private → business |
| 事業主貸 |
Personal withdrawal/payment: business → private |
| 雑費 |
Anything else |
Cash Withdrawal Classification
| Situation |
Accounting and record |
Cash from an account recorded as business 普通預金, used privately |
借方: 事業主貸 / 貸方: 普通預金. Use 事業主貸 in the filename and monthly memo; do not label it 対象外. |
| Cash retained for business use |
借方: 現金 / 貸方: 普通預金. |
| Cash used immediately for a documented business cost |
Use the actual expense account and retain the supporting receipt. |
| Withdrawal from an unbooked personal account |
No bookkeeping entry. Use 対象外 only when preserving the evidence is useful. |
| Source account or use is unknown |
Ask the user before renaming or updating the monthly memo. |
Examples
2026-04-04-print-nikko-tbf20-155380-印刷費.png
2026-04-04-transfer-nikko-155380-事業主借.jpg
2026-04-11-transport-rakutravel-tbf20-8900-旅費交通費-技術書典20大阪東京バス.png
2026-07-26-withdrawal-bank-private-50000-事業主貸-私用現金引出.jpg
