rtokens: The BOJ does not want the yen 's weakness to lead to pessimism over the economy , " said Taisuke Tanaka , market strategist with Credit Suisse in Tokyo .
pos: " EX VBD NN IN JJ NNS MD VB JJ NNS IN DT NN VBZ IN CD NN .
tokens: " There was concern that foreign investors may sell Japanese stocks if the dollar goes above 115 yen .
ltokens: Some said the central bank may have been concerned a weaker yen would lead to unfounded pessimism about Japan 's economy .