BOSTON -- What various companies are saying about how the March 11 earthquake in Japan is affecting their production. Updates as of March 28.

• AKM Semiconductor: No impact (xBit, March 21)
• AT&S: No effects (company, March 21)
• Canon: Restarted operations at two digital camera plants on March 25; two camera plants remain closed (Reuters, March 28)
• CMK: No damage reported (PCD&F, March 23)
• Daisho Denshi: Iwate site (directly west of the epicenter) sustained damage is offline; two plants in Tochigi suffered only minor damage, but production is intermittent due to power outages (PCD&F, March 24)
• Denso: temporarily halted production (Bloomberg, March 14)
• Elpida Memory: Semiconductor assembly facility in Yamagata has been damaged. Hiroshima plant, and subsidiary Rexchip Electronics and assembly and testing subsidiary Akita Elpida currently operating at close to normal levels. Inventories sufficient to meet demand through June (DigiTimes, March 28)
• Hitachi Chemical: Supplies not interrupted (Wall Street Journal, March 21)
• Hitachi Kasei Polymer: halted production of copper-clad laminates for two weeks (xBit, March 21)
• Honda: Extended production halt in Japan to April 3 (Reuters, March 28)
• Ibiden: No damage reported (PCD&F, March 23)
• Kinus Interconnect Technology: Could be affected by BT resin shortage (Wall Street Journal, March 17)
• Mazda: Suspended production at Hofu factory in Yamaguchi; Hiroshima factory on limited production (Reuters, March 28)
• MEMC: Suspended operations at Utsunomiya plant (xBit, March 21)
• Meiko Electronics: Fukushima site (18 km from nuclear plant) is quarantined; Ishinomaki site north of Sendai is destroyed (PCD&F, March 24)
• Mitsubishi Gas Chemical: temporarily halted production of bismalemide triazine (BT epoxy resin) (Wall Street Journal, March 21); halted production of copper-clad laminates for two weeks (xBit, March 21)
• Murata: shut down factory in Sendai, Miyagi (Bloomberg, March 14)
• Nan Ya: Seeks new supplier of BT resin (Wall Street Journal, March 21)
• Nikon: Closed four production facilities; no reopening date set (Reuters, March 21)
• Nippon Mektron: Okubara production facility, in Ushiku City, Ibaraki prefecture, is 70% operational; Kashima plant in Kamisu City, expected to be 50% restored by March 25, but full repair will be a long way off. Kashima plant in Kamisu City, expected to be 50% restored by March 25, but full repair will be a long way off. (Company, March 23)
• Nissan: resumed vehicle production at all assembly plants in Japan Thursday. Iwaki engine plant still offline. (Reuters, March 28)
• Panasonic: no major damage to manufacturing facilities, but infrastructure (power, gas, etc.) needs to be restored. Some plants in northeast Japan remain closed (Reuters, March 28)
• PartnerTech: Parts of supply chain affected (company, March 18)
• Powerchip Technology: Ceased offering DRAMs on spot market (Bloomberg, March 14)
• Renesas: Ceased operations at eight facilities; no date for restarting production set (Reuters, March 21). Restarted production at Yonezawa and Tokyo Device Division back-end plants north of Tokyo; preparing to restart another five facilities (Electronics Weekly, March 22)
• Rohm Semiconductor: Miyagi plant lacks power (company, March 21)
• Samsung: Ceased offering DRAMs on spot market (Bloomberg, March 14)
• Seiko Holdings Corp.: Suspended operations (Bloomberg, March 14)
• Shin-Etsu Chemical: Kashima Plant and Shirakawa are wholly halted. (Company, March 28)
• Sony: Production remains suspended at five plants in central and southern Japan making digital cameras, camera lenses, etc. Another plant may be affected by rolling power blackouts. Six sites in northern Japan remain closed (Reuters, March 28)
• Sumco: temporarily halted silicon wafer production (Bloomberg, March 14)
• TI: Factory in Miho closed; at least 3 weeks to reopen (Zacks, March 16); Aizu-wakamatsu facility suffered minor damage and is expected to be operational by mid-April (Zacks, March 16)
• Suzuki Motor:  Car production halted at its three assembly plants until March 29; has not decided on production plans for March 30 or beyond (Reuters, March 28)
  
• Toshiba: Iwate prefecture chip factory closed; no date set to resume output. LCD assembly line to be closed for a month. (Reuters, March 28)
• Toyota: Production at 12 plants will remain offline until Thursday or later (Reuters, March 22)
• Unimicron: Could be affected by BT resin shortage (Wall Street Journal, March 17)

Check back for updates.