Like Satsuki Morita, many university students are closely watching political negotiations that could raise Japan's tax-free threshold for annual income, with its current level of 1.03 million yen ($6,800) seen as a key factor discouraging part-time employees from working more hours amid labor shortage in the country.A sophomore at Hosei University in Tokyo, Morita has several part-time jobs, including working as a teacher at a cram school and as a convenience store clerk. By the end of November, her earnings this year stood at around 900,000 yen.But Morita, 20, hopes to work, and earn, more…READ FULL ARTICLE