Homegrown production of caviar is on the increase in Japan after domestic producers stepped up efforts to improve their breeding technology for sturgeons in recent years in a bid to increase revenue from one of the world's most luxurious delicacies.

The country's largest caviar producer, Miyazaki Prefecture-base Japan Caviar Inc., is a success story when it comes to mastering the production of caviar, the salted eggs of sturgeons.

The company began exporting its first batch of domestically produced caviar earlier this month in an effort to break into overseas markets such as Asia, the U.S. and Europe.