*Nikkei rises as oil's fall to six-week low buoys carmakers
*Banks rise on U.S. financial rescue hopes, but pare gains
*Some plants halted after earthquake, but impact limited (Adds stocks, details)
By Elaine Lies
TOKYO, July 24 (Reuters) - Japan's Nikkei stock average climbed 1.3 percent on Thursday, in sight of its highest close since June, as Toyota Motor Co <7203.T> and other carmakers led gains among exporters after oil prices fell to a six-week low and the yen weakened. Advantest Corp <6857.T> and other chip equipment firms sold off earlier this week bounced back, while banks rose on relief for troubled home financers Fannie Mae <FNM.N> and Freddie Mac <FRE.N> after U.S. President George W. Bush dropped a threat to veto a housing rescue bill.
A strong earthquake in northern Japan early on Thursday led a handful of companies to halt production at plants in the affected area, but one -- Nippon Steel Corp's <5401.T> Kamaishi Works -- had resumed by midday, and others were expected to restart soon.
Oil fell $4 on Wednesday, extending its losses to more than $20 from the all-time peak above $147 a barrel hit on July 11 and helping to buoy the dollar, which at one point on Thursday touched a one-month high against the yen.
"The fundamental issue is oil, and this is helping the market become cautiously optimistic," said Koichi Ogawa, chief portfolio manager at Daiwa SB Investments.
"There's a sense that investors still lack confidence, but the fall in oil has sparked some buying, and with banks likely having hit bottom, optimism may grow."
Some market players said financials were likely to hold their ground and provide support for the market at least into next week but others said the impact of this strength could well be limited.
"There's certainly some relief now regarding Freddie Mac and Fannie Mae, but this is mainly just over the short term," said Yutaka Miura, a senior technical analyst at Shinko Securities.
"A comprehensive solution hasn't yet been found, and this will lead to uncertainty over the longer term."
The benchmark Nikkei <
> gained 168.78 points to 13,481.71. The broader Topix < > rose 1.4 percent to 1,321.37.DRIVEN BY AUTOS
Carmakers, which had seen sharp selling recently, powered higher.
Honda Motor Corp <7267.T> rose 2.7 percent to 3,800 yen and Toyota gained 3.7 percent to 5,050 yen, becoming the third- and fourth-biggest contributors, respectively, to the Nikkei's rise by volume weight. Chip equipment makers, which tumbled earlier this week after a brokerage cut its rating on the sector to "neutral" from "bullish", rebounded. Advantest surged 5.1 yen to 2,390 yen and Tokyo Electron Inc <8035.T> climbed 2.8 percent to 6,240 yen.
Blue-chip exporters rose across the board, with Canon Inc <7751.T> gaining 2.1 percent to 5,280 yen, Sony Corp <6758.T> climbing 2.5 percent to 4,490 yen, and Kyocera Corp <6971.T> rising 1.9 percent to 9,330 yen.
Banks had pared gains by midday but still remained in positive territory, with Mitsubishi UFJ Financial Group <8306.T> gaining 1.9 percent to 1,029 yen and No. 3 bank Sumitomo Mitsui Financial Group <8316.T> up 0.7 yen to 883,000 yen.
Trade was moderate on the Tokyo exchange's first section, with 858 million shares changing hands, in line with last week's morning average. Advancing stocks outpaced declining ones by a ratio of more than 6 to 1. (Reporting by Elaine Lies)