対馬

The kanji were transliterated into Old Chinese by Chen Shou in Wajinden(original text here):

始度一海，千餘里至對馬國。 [Classical Chinese, trad.]

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始度一海，千余里至对马国。 [Classical Chinese, simp.]

Shǐ dù yī hǎi, qiān yú lǐ zhì Duìmǎ guó. [Pinyin]

After crossing a sea for the first time, one arrives at Tsushima Province in more than 1,000 li.(Wiktionary translation)

• (Tokyo) つしま [tsúꜜshìmà] (Atamadaka – [1])
• IPA^(key): [t͡sɨɕima̠]

対(つし)馬(ま) • (Tsushima) 

1. Tsushima (an island of Japan)
2. a surname