Claim

At the start of the 18th century, Japan almost completely cut itself off from the outside world under a policy called Sakoku.

“18वीं सदी की शुरुआत में जापान ने खुद को बाहरी दुनिया से लगभग पूरी तरीके से काट लिया... और इस नीति को साकोकू नीति कहते हैं।”

Rationale

Central assertion (Japan isolated itself under the Sakoku policy) is correct, but the stated date is wrong: Sakoku was imposed in the 1630s — the early/mid 17th century — not 'the start of the 18th century.' The contradicted date detail makes it inaccurate.

Evidence

• https://en.wikipedia.org/wiki/Sakoku Sakoku enacted via edicts from 1633-1639 under Tokugawa Iemitsu ✓ reachable · archived
• https://www.britannica.com/topic/sakoku Seclusion policy of the Tokugawa shogunate lasting c.1639-1853, established in the 1630s ✗ unreachable · HTTP 403