Operator
Operator Information
Office 307 is the trade name under which Nakagane Seito operates as a sole proprietor.
| Trade name | Office 307 |
|---|---|
| Operator | Nakagane Seito（中兼聖人） |
| Established | June 30, 2026 |
| Address | 〒179-0085 東京都練馬区早宮1-18-35 |
| [email protected] | |
| Phone | 070-1504-1216 |
| Personal site | seito-nakagane.com |
| X | @nakagami_306 |
About the ventures
Office 307 runs multiple ventures. The details and terms of each are published on their own service sites. You can see the list of ventures on the home page .
Sales & transactions
No products or services are sold or paid for on this site. The legal notice (Tokushoho) for each service is published on this site and on each service site.