April 16 (Bloomberg) -- Japan’s Nikkei 225 Stock Average rose 12.3, or 0.1 percent, to 8,755.26 as of the close in Tokyo. The following were among the most active shares in the Japanese market today. Stock symbols are in parentheses after company names.

Aderans Holdings Co. (8170 JT) soared by its daily upper limit of 11 percent to 1,045 yen, the biggest gain since Sept. 30. Unison Capital Inc. will begin a tender offer for at least 33.4 percent of Aderans as early as June, Nikkei English News reported. Aderans plans to speed up restructuring efforts of its main wigmaking operations while strengthening other businesses, Nikkei said.

Best Denki Co. (8175 JT) tumbled 7.3 percent to 256 yen. Officials of the home-appliance retailer and printing company Wellco Corp. (7831 JT) may be arrested by Osaka prosecutors on alleged misuse of postal discounts, the Asahi newspaper reported, citing an unnamed investigator familiar with the matter. The Osaka District Public Prosecutors Office today started an investigation at Best Denki’s headquarters over alleged breaches of postal rules, Keiichi Yoshinaga, from the company’s corporate development department, said by phone today. Wellco lost 5.7 percent to 116 yen.

Central Security Patrols Co. (9740 JT) added 2 percent to 818 yen. The security service company said net income in the year ended Feb. 28 rose 7.9 percent to 1.07 billion yen, with a 5 percent advance in sales.

Daiken Corp. (7905 JT) advanced 4.2 percent to 174 yen. The fiberboard maker said in a preliminary earnings statement full- year net income amounted to 600 million yen, 71 percent above its outlook, due to drops in stock-valuation charges and tax costs following changes in accounting methods.

Doutor Nichires Holdings Co. (3087 JT) plummeted 7 percent to 1,260 yen. The coffee-shop operator said full-year net income fell 26 percent to 4.04 billion yen as increased prices for food materials weighed on earnings. Nomura Holdings Inc. cut its rating on Doutor to “neutral” from “buy,” saying benefits from opening new stores and the company’s attempts to cut food costs may not offset falling same-store sales this fiscal year.

Inpex Corp. (1605 JT) dropped 2.4 percent to 705,000 yen. Japan’s largest oil explorer said it may delay starting production at an offshore oil field in Western Australia due to a fire at its facility. Inpex had its stock price estimate cut to 950,000 yen from 1.1 million yen by Macquarie Group Ltd., which maintained its “outperform” rating. Also, Inpex will have to reassess its choice of Darwin in the Northern Territory as the site for its Australian liquefied natural gas plant, Western Australian Premier Colin Barnett said in Perth today.

Jupiter Telecom Co. (4817 JQ) jumped 7.8 percent to 62,000 yen. The cable television provider said subscriber households of its services, including cable television, high-speed Internet and telephone services, increased 17 percent to 3.18 million in the year ended March 31.

Kanto Auto Works Ltd. (7223 JT) rallied 3.3 percent to 1,084 yen. The car assembler said in a preliminary earnings statement net income amounted to 400 million yen in the year just ended, reversing from its 1.5 billion yen loss outlook, citing lower costs relative to sales.

Nagase & Co. (8012 JT) slid 2.5 percent to 791 yen. The chemical products maker said in a preliminary earnings statement full-year net income was 5.5 billion yen, missing its 6 billion yen outlook by 8.3 percent, due to stock-valuation losses.

NEC Electronics Corp. (6723 JT) surged by its daily limit of 12 percent to 930 yen. The company is in merger talks with Renesas Technology Corp. (RENEZ JP), a semiconductor venture of Hitachi Ltd. (6501 JT) and Mitsubishi Electric Corp. (6503 JT), NEC Electronics said today, confirming an earlier report in the Nikkei newspaper. The merger would create Japan’s biggest chipmaker with annual sales of more than 1.2 trillion yen, the report said. Hitachi fell 2.9 percent to 304 yen. Mitsubishi Electric was unchanged at 503 yen.

Pal Co. (2726 JT) climbed by its daily limit of 20 percent to 1,214 yen, a record gain since its listing on the Tokyo Stock Exchange in February 2004. The apparel store chain forecast net income will grow 42 percent to 2.21 billion yen this fiscal year, with a 4 percent rise in sales. Profit fell 8.3 percent to 1.56 billion yen in the year ended Feb. 28, due to costs related to store closures.

Park24 Co. (4666 JT) increased 3.2 percent to 700 yen. The parking-lot operator said sales in March climbed by 7.2 percent to 7.28 billion yen from the same month a year earlier.

Renown Inc. (3606 JT) surged 15 percent to 158 yen. The apparel company said it expects its net loss to narrow to 2 billion yen in the fiscal year started March 1 as it cuts administration costs. Renown had a 12.3 billion yen loss a year earlier.

Ryohin Keikaku Co. (7453 JT) slumped 6.2 percent to 3,770 yen. The retailer of Muji-brand household goods said full-year net income fell 35 percent to 6.94 billion yen, citing slumping same-store sales and devalued stockholdings.

Sagami Rubber Industries Co. (5194 JT) ended the session untraded, with the last bid at 240 yen, up the exchange-imposed limit of 26 percent from the last close of 190 yen. The rubber maker’s current profit, or pretax profit from operations, may quadruple to a record 400 million yen in the fiscal year ending March 2010, due to growing sales of its mainstay products in the U.S. and Europe, the Nikkei newspaper said.

Santen Pharmaceutical Co. (4536 JO) soared 11 percent to 2,910 yen, its biggest gain since Oct. 30. The ophthalmic medicine maker said it has signed a license agreement with Merck & Co. (MRK US) on tafluprost, a treatment for glaucoma, allowing the U.S. drugmaker to sell the drug in the Americas, Africa and western Europe excluding Germany.

Takashimaya Co. (8233 JT) rallied 5 percent to 700 yen. The department store chain was boosted to “neutral” from “underperform” by Hidehiko Aoki, a Tokyo-based analyst at Merrill Lynch & Co., the securities firm bought by Bank of America Corp.

Takeuchi Manufacturing Co. (6432 JQ) sank 11 percent to 778 yen. Toyota Tsusho Corp. (8015 JT), a trading company in the Toyota Motor Corp. (7203 JT) group, will buy new shares of Takeuchi to hold a 6.99 percent stake in the construction- machinery maker, they said in a joint statement. Separately, Takeuchi said it had a full-year net loss of 1.49 billion yen, compared with 6.49 billion yen in profit a year earlier, with a 38 percent drop in sales. Toyota Tsusho declined 1.7 percent to 1,236 yen. Toyota dropped 2.4 percent to 3,710 yen.

Usen Corp. (4842 JX) plunged 7.6 percent to 121 yen. The music broadcasting service seeks to eliminate 600 jobs as it sells off unprofitable businesses such as video Web site Gyao. Usen will take a charge of about 900 million yen related to the job cuts. It is assessing the effect of the charge on its earnings, the company said in a statement.

To contact the reporters on this story: Norie Kuboyama in Tokyo at nkuboyama@bloomberg.net; Akiko Ikeda in Tokyo at iakiko@bloomberg.net.

Last Updated: April 16, 2009 02:48 EDT