This study reviews articles about the prices of Kajika frogs (Buergeria buergeri) in eight Japanese newspapers published between 1884 and 1938. Frog prices have been converted to present-day United States dollars (US$). The frogs had a wide range of prices. Premium individuals, in particular, were often sold for US$1,000–2,000. In this paper, I discuss the reasons why exceptional individuals were traded at a high price in the market, although Kajika frogs were a common native species. Other topics, such as the presentation of frogs as gifts to royal families, are also discussed.

中文翻译：

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日本近代君主时期作为高级宠物的卡吉卡蛙 (Buergeria buergeri)

本研究回顾了 1884 年至 1938 年间出版的八份日本报纸上关于 Kajika 青蛙 (Buergeria buergeri) 价格的文章。青蛙价格已转换为今天的美元 (US$)。青蛙的价格范围很广。特别是高级个人，通常以 1,000 至 2,000 美元的价格出售。在本文中，我讨论了为什么特殊个体在市场上以高价交易的原因，尽管 Kajika 青蛙是一种常见的本地物种。还讨论了其他主题，例如将青蛙作为礼物赠送给皇室成员。