Human beings have always found out methods to preserve food, right from their existence. Today, men have their ears stretched to produce a fashion statement, or to follow along with the instance of their favourite pop group. But today, due to hectic modern life, due to globalization and easy transport facilities, shelf-life of various forms of food is increased by employing various techniques.
Modern Methods of Food Preservation. Sodium hydroxide can be used to make food too alkaline. If you are already in Japan, look for that 'Izakaya', that is an informal pub-style of eating but is highly recommended.