Convenience stores provide many of us with  handy place to pop into 24 hours  day to buy things we have forgotten or didn't have time to get from other stores. They also provide part-time jobs for thousands of people.  new report from Japan suggests that some convenience stores are not so convenient for their workers.  report, from Japan's national broadcaster NHK, says overbearing and unrealistic sales quotas are being imposed on many part-time workers. Labor rights experts are calling on store bosses to stop what they deem to be  exploitative practice. There are reports of workers having hundreds of dollars deducted from their salaries and having to buy unsold stock for failing to meet  quotas.
 expert on Japanese labor law Professor Mitsumo Uematsu said deducting  quota's worth of unsold products from salaries violated labor laws. He also questioned why so many part-timers felt compelled to buy unsold stock, which could be "seen as being forced to take on  economic burden because of pressure from stores". Professor Uematsu urged  headquarters of convenience store chains to tackle this problem so that part-timers are not exploited. One part-time worker said he was "drowning in quotas". Another said that workers can lose up to 20-30% of their monthly salary. The biggest losses come with quotas for unsold seasonal items like Valentines and Christmas goods and special sushi rolls.