At a glance
Verb + ものとする states a rule or an assumption in formal writing. It means "shall ~" in contracts and regulations, or "assume that ~" in calculations and problems.
Verb (plain form) + ものとする
会費は毎月末日までに支払うものとする。 Membership fees shall be paid by the last day of each month.
How to form it
The verb is usually in the dictionary form. The ない-form and た-form are also used.
| Attaches to | Example | Meaning |
|---|---|---|
| Verb, dictionary form | 支払うものとする | shall pay |
| Verb, ない-form | 責任を負わないものとする | shall not be responsible |
| Verb, た-form | 同意したものとする | shall be deemed to have agreed |
| Noun or な-adjective + である | 無効であるものとする | shall be invalid |
Register: formal written Japanese. The polite form ものとします is common in terms of service.