Takehiko Fujita wouldn't be able to do his job selling eye drops and pain relievers without his pocket translator.

Instead of an app, language dictionary or call-in translation service, the clerk in a Japanese drugstore uses Pocketalk, a 25,000 yen ($230) device made by Sourcenext Corp. that looks like an oval puck. The gadget translates phrases to and from 74 languages, helping Fujita communicate with customers from Sweden, Vietnam and other countries.

Tourists are flooding into Japan, with 31 million people visiting the archipelago in 2018, triple the number from six years earlier, according to the Japan National Tourism Organization. Businesses are struggling with visitors looking to shop, eat and move around — a situation that will probably worsen during next year's Tokyo Olympics. Seeking to tap into demand, electronics maker Fujitsu Ltd. and office supplier King Jim Co. are challenging Pocketalk's 94% market share with their own products.

"I'm not worried anymore," said Fujita, who works at a Takeya store in Tokyo's Okachimachi area. He used to rely on Google Translate to talk to customers, but now he picks up the Pocketalk dangling from his neck to chat with people. "I can speak to people who, at first glance, come from foreign countries and might not understand me."

While smartphone apps remain a popular — and common — translation tool, Pocketalk has carved out its own niche. Dedicated for just one purpose, the gadget has a sensitive microphone and accesses machine translation and voice-recognition software from Google, Baidu and other services, improving accuracy. More than 500,000 Pocketalk units have been sold since it debuted in 2017.

Formerly a developer of greeting-card design software, Sourcenext collaborated with Dutch startup Travis, which had already developed a translator prototype, to create Pocketalk. Additionally, Sourcenext used expertise from Rosetta Stone Inc.'s Japan unit, which it bought in April 2017.

Sourcenext is also targeting outbound Japanese tourists. Japan remains a relatively monolingual country, ranking 49th among 88 countries and regions in terms of English proficiency. A new Pocketalk model features a built-in global SIM card that's active for two years in more than 100 countries. It lets the device access data to process translations.

"With this tool, tourists are able to do things they couldn't before," said Hajime Kawatake, senior software designer at Sourcenext. There's now growing interest from businesses in Japan that deal with foreigners, he said, adding that Sourcenext has received inquiries from more than 4,000 companies.

Fujitsu has been marketing its own translator, called Arrows Hello. The 30,000 yen ($285) product, on sale since May and similar in shape to the Pocketalk, is different because it has a camera that also translates text.