This rare tomato is unmistakable. There's nothing else like it. It's an 8 oz., pear-shaped, mahogany-black tomato with green shoulders. The flavor is outstanding, rich and delicious, and the plants are very productive.  Also known as Black Russian Truffle. This  open-pollinated tomato was created as part of a line of Russian pear tomatos in various colors. So it actually comes from Russian, not Japan.  Indeterminate. 75 days.