Matsutake mushrooms harvested in Japan can cost over $500 per kilogram. Mushroom foragers will search for matsutake mushrooms once a year, every autumn. still, it's hard to predict the quality of a harvest.
Over the past 70 years, Japan's harvest has declined by over 95%. Click here to view a video that will address the questions why these mushrooms are so expensive, and why have they almost disappeared?
Source: koreaherald.com