Speculation is rising that Prime Minister Junichiro Koizumi will dissolve the House of Representatives as early as October now that the ruling coalition has basically agreed to hold an extraordinary Diet session in mid-September.

Having an extraordinary session under this time-frame makes it more likely for the Liberal Democratic Party's presidential election to be pushed forward to early September or even late August, as Prime Minister Junichiro Koizumi's term as the LDP head expires on Sept. 30.

"Usually, the LDP's presidential election comes before an extraordinary session starts. If that's the case, we will have to discuss (the timing of the LDP's election) with the party," Chief Cabinet Secretary Yasuo Fukuda said Friday.