Bridgestone saw its share price reach a record high on June 14.  (Photo by Hisanaga Junya)

KENTA SHINOZAKI, Nikkei staff writer |

TOKYO — A succession of upgraded earnings projections from analysts is bolstering gains in Japanese stock prices, with the market ending trading Wednesday on a four-session winning streak.

The Nikkei Stock Average added 1.5% to finish at 33,502 points, reaching a level not seen since March 1990.

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