en.wikipedia.org/wiki/Samurai

The 1871 Danpatsu Dattōrei (散髪脱刀令) is commonly described in primary and library-reference sources as a measure that permitted men to cut their hair and abandon sword-wearing, not as a ban on the samurai topknot.

The National Archives of Japan explains that in Meiji 4 (1871) the government proclaimed: "散髪、制服、略服、礼服ノ外、脱刀モ自今勝手タルベシ" and summarizes this as allowing men to go without a topknot and allowing even shizoku/samurai-status people not to wear swords. In other words, it recognized freedom of hairstyle and dress rather than outlawing the topknot.

The National Diet Library's collaborative reference database likewise states that in August 1871 the government issued the 散髪脱刀令, permitted haircutting, and encouraged it. That directly contradicts the claim that the government "banned" the samurai topknot in 1871.

So the historically accurate point is that the 1871 edict allowed and promoted haircutting; it did not itself impose a nationwide legal ban on the chonmage.

This phrase mislocates Ayutthaya.

UNESCO's page for the Historic City of Ayutthaya states that the site is in Phra Nakhon Si Ayutthaya Province, and Thailand's National Statistical Office classifies Phra Nakhon Si Ayutthaya under the central region. By contrast, the same statistical office classifies Nakhon Si Thammarat under the south.

So the sentence appears to have attached the southern-Thailand label to the wrong polity/place. Ayutthaya was a kingdom centered in central Thailand, whereas Nakhon Si Thammarat is in southern Thailand.

This compresses several distinct events into one inaccurate statement.

According to the U.S. Department of State's Office of the Historian, Perry sailed into Edo Bay on July 8, 1853 and delivered President Fillmore's letter announcing that the United States sought to open relations with Japan. But the same source says formal recognition came in 1854, and full diplomatic relations were established in 1858 with the Treaty of Amity and Commerce.

The U.S. National Archives is even more explicit about the 1854 treaty's limits: the Treaty of Kanagawa protected American whalers and provided coaling ports, but "He did not, however, open Japan to trade. It wasn't until 1858" that a commercial treaty was achieved.

So the claim is wrong on both date and substance: Perry's 1853 arrival did not itself open Japan's borders to foreign trade, and the first agreement in 1854 was not yet a full trade opening.