The 40 new applications, which have been approved by the Japanese government, total 12,842 hectares and cover prospective geology between the Sanru project and Irving Resources Inc's (CNSX:IRV) Omu project, the firm said in a statement.
Japan Gold said its Sanru project now covers a 20 kilometre (km) by 16km under-explored area hosting five historic gold workings.
The area lies immediately along strike of the region's second largest gold mine - the Sanru mine, which has produced 225,000 ounces of gold at an average grade of 7.4 grams per ton (g/t) and 1.4 million ounces silver.
The firm said that to advance the Sanru project, it planned to begin regional sediment and Bulk Leach Extractable Gold geochemical surveys, geological mapping and rock-chip sampling.
It will also follow up with groundwork on anomalies and an investigation of other recorded historic workings.
At Sanru, five historic gold workings lie within the boundary of the project, which are along strike of the same structure which hosts the mine and prospective parallel structures.
Regional stream sediment sampling was carried out by the geological division of the Japanese Ministry of International Trade and Industry in the late 1990's but no detailed follow-up mapping or drilling was undertaken on the anomalies identified.
Based on its research, Japan Gold believes no exploration programs have been carried out in the new applications area.
Japan Gold holds 18 projects across Japan's three largest islands - Hokkaido, Honshu and Kyushu.
These cover areas with known gold occurrences, have a history of mining, and are prospective for high-grade epithermal gold mineralization.
Shares in the firm in Toronto added 5.6% to $0.28 each.
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