池田 誠 This workflow corresponds to n8n.io template #16879 — we link there as the canonical source.
This workflow follows the Google Drive → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "Rename invoices & receipts for Japan e-Bookkeeping (Gemini OCR)",
"tags": [],
"nodes": [
{
"id": "d763f532-ef61-4602-8487-cf3b5ef50f6c",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-160,
-48
],
"parameters": {
"width": 480,
"height": 1080,
"content": "## Rename invoices & receipts for Japan e-Bookkeeping (Gemini OCR)\n\n### Who's it for\n\nJapanese businesses, accountants and bookkeepers digitizing paper invoices and receipts under Japan's Electronic Bookkeeping Act (denshi-chobo-hozon-ho). Scanned files must be searchable by transaction date, partner and amount; renaming them by hand means opening every file, closing it, and typing the name. This workflow removes that manual work. Originals are never modified or deleted.\n\n### How it works\n\nThis workflow manually processes files from a Google Drive input folder and renames invoices or receipts for Japan e-Bookkeeping compliance. It downloads each file one at a time, filters for supported image or PDF formats, sends valid files to Gemini for OCR, and builds a compliant filename from the extracted document data. Files that pass validation are copied to an output folder with the new name, while unsupported or ambiguous files are copied to a skip folder for manual review.\n\n### Setup steps\n\n- Configure Google Drive credentials for all Drive nodes and ensure they have access to the input, output, and skip folders.\n- Set the inputFolderId, outputFolderId, skipFolderId, and maxFiles values in the configuration node.\n- Configure the Gemini HTTP request with a valid Google Generative Language API key and confirm the selected Gemini model supports image and PDF input.\n- Verify the code nodes' filename rules match the required Japan e-Bookkeeping naming convention before running on production files.\n\n### Customization\n\nAdjust the supported MIME types, maximum files per run, Gemini prompt, and filename-building logic to match your document formats and bookkeeping naming rules."
},
"typeVersion": 1
},
{
"id": "5bc01d7b-8d77-48cb-8e14-e3a6bd0c93e4",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
112
],
"parameters": {
"color": 7,
"width": 672,
"height": 304,
"content": "## Start and configure folders\n\nBegins the workflow manually, defines the Google Drive input, output, skip folder IDs and file limit, then lists files from the input folder."
},
"typeVersion": 1
},
{
"id": "c2377aa9-213e-43f5-ab8f-626dc7d15e0d",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1200,
112
],
"parameters": {
"color": 7,
"width": 896,
"height": 416,
"content": "## Batch download and filter\n\nIterates through the listed files one at a time, downloads each file, converts it to base64, detects its MIME type, and checks whether it is a supported document type for OCR processing."
},
"typeVersion": 1
},
{
"id": "54416a80-b1b2-4e64-9229-5e740f840c50",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
2128,
80
],
"parameters": {
"color": 7,
"width": 512,
"height": 336,
"content": "## Extract and build filename\n\nSends supported images or PDFs to Gemini for invoice or receipt OCR, then uses code to interpret the response and construct a Japan e-Bookkeeping compliant filename and routing decision."
},
"typeVersion": 1
},
{
"id": "033fd42d-2b33-48a6-bfd0-29bbe4b7b78e",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
2688,
-48
],
"parameters": {
"color": 7,
"width": 416,
"height": 576,
"content": "## Validate and copy files\n\nChecks whether the extracted data represents a single valid document, then either copies and renames it into the output folder or sends it to the skip folder for manual review before returning to the next batch item."
},
"typeVersion": 1
},
{
"id": "56f40dcf-557f-4a69-9431-52af0afdb795",
"name": "Launch Workflow Manually",
"type": "n8n-nodes-base.manualTrigger",
"position": [
448,
240
],
"parameters": {},
"typeVersion": 1
},
{
"id": "ff302bd0-d46b-4364-b132-0bee141bed93",
"name": "Set Folder Configurations",
"type": "n8n-nodes-base.set",
"position": [
688,
240
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "0bb831be-1a13-4361-b190-6db5a0ee24ab",
"name": "inputFolderId",
"type": "string",
"value": "YOUR_INPUT_FOLDER_ID"
},
{
"id": "b3bc92a1-5659-4c0b-907d-8b5154e7be94",
"name": "outputFolderId",
"type": "string",
"value": "YOUR_OUTPUT_FOLDER_ID"
},
{
"id": "1a5e99d8-f1a8-4274-8d96-5a8d5e303a7b",
"name": "skipFolderId",
"type": "string",
"value": "YOUR_SKIP_FOLDER_ID"
},
{
"id": "297c7acf-48db-4f09-aa33-c9abc9ba464b",
"name": "maxFiles",
"type": "number",
"value": 20
}
]
}
},
"typeVersion": 3.4
},
{
"id": "4b76ff2c-b701-4b5e-8a73-358efd2c22cc",
"name": "Retrieve Input Folder Files",
"type": "n8n-nodes-base.googleDrive",
"position": [
928,
240
],
"parameters": {
"limit": "={{ $json.maxFiles }}",
"filter": {},
"options": {},
"resource": "fileFolder",
"queryString": "='{{ $json.inputFolderId }}' in parents and trashed=false",
"searchMethod": "query"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "e36a56e3-24b5-414e-95f4-2b2127cd3079",
"name": "Process Files Individually",
"type": "n8n-nodes-base.splitInBatches",
"position": [
1248,
240
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "a94aea0d-4a92-4c72-a4a6-9e8eb1840486",
"name": "Download from Google Drive",
"type": "n8n-nodes-base.googleDrive",
"position": [
1488,
352
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"options": {},
"operation": "download"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "295caf04-acb3-403e-87c6-50b7e26cf847",
"name": "Validate Single Document Status",
"type": "n8n-nodes-base.if",
"position": [
2736,
256
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "250db40d-2b8c-447b-8716-e5ada857f716",
"operator": {
"type": "string",
"operation": "notEmpty"
},
"leftValue": "={{ $json.newName }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2
},
{
"id": "bf839723-c950-4d27-aafe-8aa079fdf730",
"name": "Copy and Rename to Output Folder",
"type": "n8n-nodes-base.googleDrive",
"position": [
2960,
160
],
"parameters": {
"name": "={{ $json.newName }}",
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.fileId }}"
},
"driveId": {
"__rl": true,
"mode": "list",
"value": "My Drive"
},
"options": {},
"folderId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Set Folder Configurations').first().json.outputFolderId }}"
},
"operation": "copy",
"sameFolder": false
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "81eda505-849c-430b-ae3e-66237aa1b684",
"name": "Copy to Manual Review Folder",
"type": "n8n-nodes-base.googleDrive",
"position": [
2960,
368
],
"parameters": {
"name": "={{ $json.originalName }}",
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.fileId }}"
},
"driveId": {
"__rl": true,
"mode": "list",
"value": "My Drive"
},
"options": {},
"folderId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Set Folder Configurations').first().json.skipFolderId }}"
},
"operation": "copy",
"sameFolder": false
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "11fdaeb9-9c1c-483a-bb47-a6abac56a62e",
"name": "Encode File and Detect MIME",
"type": "n8n-nodes-base.code",
"position": [
1728,
352
],
"parameters": {
"mode": "runOnceForEachItem",
"jsCode": "const meta=$('Process Files Individually').item.json;\nconst ext=(meta.name||'').toLowerCase().split('.').pop();\nconst map={jpg:'image/jpeg',jpeg:'image/jpeg',png:'image/png',webp:'image/webp',heic:'image/heic',heif:'image/heif',tif:'image/tiff',tiff:'image/tiff',pdf:'application/pdf'};\nconst isSupported=Object.keys(map).includes(ext);\nconst buf= await this.helpers.getBinaryDataBuffer(0,'data');\nconst b64= buf.toString('base64');\nconst bin=$input.item.binary && $input.item.binary.data;\nconst mime=map[ext]||(bin&&bin.mimeType)||'application/octet-stream';\nconst prompt=\"\u3042\u306a\u305f\u306f\u65e5\u672c\u306e\u7d4c\u7406\u66f8\u985e\u3092\u8aad\u307f\u53d6\u308b\u30a2\u30b7\u30b9\u30bf\u30f3\u30c8\u3067\u3059\u3002\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306f\u8acb\u6c42\u66f8\u30fb\u9818\u53ce\u66f8\u306a\u3069\u306e\u5e33\u7968\u3001\u307e\u305f\u306f\u5e33\u7968\u3067\u306a\u3044\u753b\u50cf\u3067\u3059\u3002\u4ee5\u4e0b\u3092JSON\u306e\u307f\u3067\u51fa\u529b\uff08\u524d\u5f8c\u306e\u8aac\u660e\u30fb\u30b3\u30fc\u30c9\u30d5\u30a7\u30f3\u30b9\u7981\u6b62\uff09\u3002{\\\"document_count\\\":<0=\u5e33\u7968\u3067\u306a\u3044,1=\u5358\u4e00,2\u4ee5\u4e0a=\u8907\u6570>,\\\"doc_type\\\":\\\"\u8acb\u6c42\u66f8|\u9818\u53ce\u66f8|\u898b\u7a4d\u66f8|\u7d0d\u54c1\u66f8|\u305d\u306e\u4ed6\\\",\\\"transaction_date\\\":\\\"YYYYMMDD\\\",\\\"partner\\\":\\\"\u53d6\u5f15\u5148\u306e\u6b63\u5f0f\u540d\u79f0(\u767a\u884c\u5143)\\\",\\\"amount\\\":<\u7a0e\u8fbc\u5408\u8a08\u306e\u6570\u5024\u30fb\u30ab\u30f3\u30de\u306a\u3057>}\u30eb\u30fc\u30eb:\u5e33\u7968\u3067\u306a\u3044\u5199\u771f\u306fdocument_count=0\u30021\u30d5\u30a1\u30a4\u30eb\u306b\u8907\u6570\u5e33\u7968\u3084\u8907\u6570\u53d6\u5f15\u306a\u3089document_count\u30922\u4ee5\u4e0a\u3002\u65e5\u4ed8\u306f\u53d6\u5f15\u5e74\u6708\u65e5(\u8acb\u6c42\u65e5\u30fb\u9818\u53ce\u65e5)\u3002\u91d1\u984d\u306f\u7a0e\u8fbc\u5408\u8a08\u3002\u8aad\u3081\u306a\u3044\u9805\u76ee\u306fnull\u3002\";\nconst bodyObj={contents:[{parts:[{inline_data:{mime_type:mime,data:b64}},{text:prompt}]}],generationConfig:{temperature:0,response_mime_type:'application/json'}};\nreturn {json:{fileId:meta.id,originalName:meta.name,ext,mime,isSupported,body:JSON.stringify(bodyObj)}};"
},
"typeVersion": 2
},
{
"id": "f961fedd-a32c-4e0f-85c7-f3781ad11d58",
"name": "Check Supported File Type",
"type": "n8n-nodes-base.if",
"position": [
1952,
352
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "ext-c-0001",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.isSupported }}",
"rightValue": true
}
]
}
},
"typeVersion": 2
},
{
"id": "96bea0f3-c643-4268-9073-60ce2eb31166",
"name": "Send to Gemini for OCR",
"type": "n8n-nodes-base.httpRequest",
"notes": "\u753b\u50cf\u3082PDF\u3082\u5171\u901a\u3067Gemini API\u306b\u76f4\u63a5\u9001\u308b\u3002x-goog-api-key\u30d8\u30c3\u30c0\u306bGemini API\u30ad\u30fc\u3092\u5165\u308c\u308b\uff08List/Download\u3068\u306f\u5225\u3002Google AI Studio\u306eAPI\u30ad\u30fc\uff09\u3002",
"position": [
2176,
256
],
"parameters": {
"url": "=https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent",
"method": "POST",
"options": {},
"jsonBody": "={{ $json.body }}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
},
{
"name": "x-goog-api-key",
"value": "YOUR_GEMINI_API_KEY"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "b7bb9ab9-bb06-4452-a763-ab3651c16eb8",
"name": "Generate Compliant Filename",
"type": "n8n-nodes-base.code",
"position": [
2496,
256
],
"parameters": {
"jsCode": "const c = $json;\nlet raw='';\ntry{ raw = c.candidates[0].content.parts.map(p=>p.text||'').join(''); }catch(e){ raw=''; }\nlet data; try{ data = JSON.parse(String(raw).replace(/```json|```/g,'').trim()); }catch(e){ data={document_count:-1}; }\nfunction san(s){ return String(s==null?'':s).replace(/[\\\\/:*?\\\"<>|]/g,'').replace(/\\s+/g,'').trim(); }\nconst p = $('Encode File and Detect MIME').item.json;\nlet newName=null;\nif(data.document_count===1 && data.transaction_date && data.amount!=null){\n newName = `${san(data.transaction_date)}_${san(data.partner)}_${san(data.amount)}_${san(data.doc_type)}.${p.ext}`;\n}\nreturn [{ json: { ...data, originalName:p.originalName, fileId:p.fileId, ext:p.ext, newName } }];"
},
"typeVersion": 2
}
],
"active": false,
"settings": {
"binaryMode": "separate",
"executionOrder": "v1"
},
"nodeGroups": [],
"connections": {
"Send to Gemini for OCR": {
"main": [
[
{
"node": "Generate Compliant Filename",
"type": "main",
"index": 0
}
]
]
},
"Launch Workflow Manually": {
"main": [
[
{
"node": "Set Folder Configurations",
"type": "main",
"index": 0
}
]
]
},
"Check Supported File Type": {
"main": [
[
{
"node": "Send to Gemini for OCR",
"type": "main",
"index": 0
}
],
[
{
"node": "Copy to Manual Review Folder",
"type": "main",
"index": 0
}
]
]
},
"Set Folder Configurations": {
"main": [
[
{
"node": "Retrieve Input Folder Files",
"type": "main",
"index": 0
}
]
]
},
"Download from Google Drive": {
"main": [
[
{
"node": "Encode File and Detect MIME",
"type": "main",
"index": 0
}
]
]
},
"Process Files Individually": {
"main": [
[],
[
{
"node": "Download from Google Drive",
"type": "main",
"index": 0
}
]
]
},
"Encode File and Detect MIME": {
"main": [
[
{
"node": "Check Supported File Type",
"type": "main",
"index": 0
}
]
]
},
"Generate Compliant Filename": {
"main": [
[
{
"node": "Validate Single Document Status",
"type": "main",
"index": 0
}
]
]
},
"Retrieve Input Folder Files": {
"main": [
[
{
"node": "Process Files Individually",
"type": "main",
"index": 0
}
]
]
},
"Copy to Manual Review Folder": {
"main": [
[
{
"node": "Process Files Individually",
"type": "main",
"index": 0
}
]
]
},
"Validate Single Document Status": {
"main": [
[
{
"node": "Copy and Rename to Output Folder",
"type": "main",
"index": 0
}
],
[
{
"node": "Copy to Manual Review Folder",
"type": "main",
"index": 0
}
]
]
},
"Copy and Rename to Output Folder": {
"main": [
[
{
"node": "Process Files Individually",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
googleDriveOAuth2Api
Pro
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About this workflow
Helps Japanese businesses digitizing paper invoices and receipts under Japan's Electronic Bookkeeping Act. Files in a Google Drive INPUT folder are read with Google Gemini OCR, then copied to OUTPUT with a compliant searchable filename (datepartneramount_type) or to SKIP for…
Source: https://n8n.io/workflows/16879/ — original creator credit. Request a take-down →
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