While the most common teas are oolongs, especially Taiwanese oolongs such as Iron Goddess and Alpine Oolong. However, black teas and green teas are also popular. Many of the classical arts can be seen in the tea culture, examples: calligraphy, flower arts, incense arts, and such. Recreation Karaoke is incredibly popular in Taiwan, where it is termed KTV (karaoke television). This is an example of something the Taiwanese have drawn, on scale, from contemporary Japanese culture. Pachinko is another example. During typhoons, many young Taiwanese will spend the day singing karaoke or playing mahjong. Many people enjoy watching miniseries collectively called Taiwanese drama. Since 1999, hot springs, known as wēnquán in Chinese and onsen in Japanese, have been making a comeback thanks to efforts by the government. Over 100 hot springs have been discovered since the Japanese introduced their rich onsen culture to Taiwan, with the largest concentration on the northernmost part of Taiwan island. Anime and manga are very popular in Taiwan. Comics, including manga, are called manhua in Taiwan. It is common to see a manga rental shop or a manga store every couple of streets in larger cities. Convenience store culture Boasting over 9,200 convenience stores in an area of 35,980 km2 and a population of 22.9 million, Taiwan has the Asia Pacific's and perhaps the world's highest density of convenience stores per person: one store per 2,500 people or .0004 stores per person. As of 1 January 2009, Taiwan also has 4,800 7-Eleven stores, and thus the world's highest density of 7-Elevens per person: one store per 4,786 people or .000210 stores per person. In Taipei, it is not unusual to see two 7-Elevens across the street from or several of them within a few hundred meters of each other. Because they are found nearly everywhere, convenience stores in Taiwan provide services on behalf of financial institutions or government agencies such as collection of the city parking fee, utility bills, traffic violation fines, and credit card payments. Eighty-one percent of urban household shoppers in Taiwan visit a convenience store each week. The idea of being able to purchase food items, drink, fast food, magazines, videos, computer games, and so on 24 hours a day and at any corner of a street makes life easier for Taiwan's extremely busy and rushed population. Convenience stores include: OK (affiliated with Circle K until 2005) FamilyMart Hi-Life 7-Eleven Cram school