Aug 31 (Reuters) - Rushydro :
* Japan's Mitsui and Japan Bank for International Cooperation plan to sign a memorandum of interest with Russian state-owned hydroelectric power generating company Rushydro in buying up to 4.9 percent of Rushydro shares, two sources told Reuters.
* The memorandum may be signed during a forum in Russia's Vladivostok this week, but there is no final agreement to make the deal, a source familiar with the companies' plans and a Russian government official said.
* Rushydro declined to comment. Further company coverage: (Reporting by Anastasia Lyrchikova)