明治16年(1883年)に日本人で初めて米国の特許を取得した人物である平山甚太は、天保11年(1840年)に豊橋で生まれました。三河吉田藩の勘定方を勤めていましたが、早くから横浜に出ていくつかの商売を手がけます。明治10年(1877年)豊前中津出身の岩田茂穂と共同で横浜に花火会社(平山煙火製造所)を設立。同年に横浜公園内で大花火大会を開催し大盛況を収めます。平山煙火製造所の名声は高まり、国内だけでなく海外からも注文が殺到、海外で販売するために作成された輸出用のカタログが横浜市中央図書館に残されています。その後、明治16年(1883年)に米国で特許を取得、明治23年(1890年)には郷里豊橋へ移転し、同地において明治33年(1900年)に60歳で逝去しました。
In 1883, Hirayama Jinta became the first Japanese to earn a patent from America as a fireworks expert. Hirayama was born in 1840 in Toyohashi, Aichi Prefecture. He worked for a while as an accountant for the Mikawa Yoshida clan, but shortly gave that up and traveled to Yokohama to try his hand at business. In 1877, together with Iwata Shigeho from Buzennakatsu, Hirayama founded a fireworks company in Yokohama. The company was named Hirayama Enka Seizosho. That same year he sponsored a very successful fireworks display at the Yokohama Park. Hirayama’s company became very well-known and was flooded with orders not only from Japan, but from overseas, as well. The export catalogue that they produced for international sales is still preserved at the Yokohama Library. In 1883, Hirayama received the American patent. In 1890, he moved back to his hometown of Toyohashi and 10 years later, in 1900, he died at the age of 60.