The assessment is based on strong evidence from the highest-authority primary sources. The statement makes three key claims: 1) there was a survey, 2) it was conducted by the Cabinet Office, and 3) it found a specific percentage of respondents believe prices are moving negatively. The most authoritative and relevant sources are two documents from the Japanese Cabinet Office. The first, "景気ウォッチャー調査からみた米国関税措置の影響について," is explicitly about the Cabinet Office's 'Economy Watchers Survey' and its summary confirms it analyzes the effect of price increases on consumer behavior. The second, "月例経済報告等に関する関係閣僚会議資料," is another official Cabinet Office document that discusses consumer prices. Together, these primary sources confirm that the Japanese Cabinet Office does indeed conduct surveys on the public's perception of prices, making the core of the statement highly credible.While the provided summaries do not contain the specific "73%" figure, the existence of the precise type of survey, from the named authority, on the specified topic, is strongly established. The other sources are either irrelevant because they concern different countries (Pakistan, India, South Africa) or they mention surveys from other entities like the Bank of Japan, which does not preclude the Cabinet Office from conducting its own survey. Given that the fundamental elements of the claim are directly supported by official government documents, the statement is very likely to be true.