(Click for main story) TOKYO, Oct 13 (Reuters) - Japanese manufacturers were the least optimistic in six months in October as they suffered from the impact of the coronavirus pandemic and automakers" output cuts, the Reuters Tankan poll showed. The Reuters Tankan index readings are derived by subtracting the percentage of respondents who say conditions are poor from those who say they are good. A negative reading means that pessimists outnumber optimists. Following is a table of indexes for key sectors and a comparison with the Bank of Japan"s quarterly tankan survey: