[tater]

The only BB class missiong is Nagato (and her sister, Mutsu). They look like maybe Ise the most. They were laid down in 1921.

Actually, Yamato was attacked by more than 1 sub, and she was spotted by others as well.

Yamato's TROM: http://www.combinedfleet.com/yamato.htm (bolded stuff (by me) is an attack, other entries are sighting reports or attacks on other vessels in Yamato's company)

28 August 1942:
Near Truk. YAMATO is attacked by LtCdr (later Vice Admiral) Glynn R. Donaho's USS FLYING FISH (SS-229). Since Donaho's ONI 41-42 "Recognition Manual" does not include the unknown YAMATO-class, he identifies her as a "KONGO-class" battleship. Donaho fires four Mark 14 steam torpedoes and thinks that he sees two hits, but they are premature explosions. YAMATO launches at least one E13A1 "Jake" floatplane to counter-attack. FLYING FISH is bombed and depth-charged by four escorts, but makes good her escape.

25 December 1943:
180 miles NE of Truk. At 0320, LtCdr (later Rear Admiral) Eugene B. McKinney, acting on an "Ultra", is running on the surface in USS SKATE (SS-305). McKinney picks up YAMATO at 27,000 yards. He dives and tries to close, but is unsuccessful until YAMATO turns towards him. He passes down her starboard beam, turns and fires his four stern tubes at her. One or two Mark 14-3A torpedoes hit YAMATO on the starboard hull near turret No. 3 at 10-5N, 150-32E. A total failure of the main armor belt system occurs due to a flawed joint between the upper and lower side protection belts. The upper magazine for No. 3 turret floods. YAMATO takes on about 3,000-tons of water. The transport mission is aborted.

11 January 1944:
At 1800, YAMATO is spotted by USS HALIBUT (SS-232), but the submarine is unable to attack.

14 January 1944:
At 2330, USS BATFISH (SS-310) picks up YAMATO group on radar, then visually, but BATFISH is unable to close the range for an attack.

10 June 1944: Operation "KON" - The Relief of Biak:
1600: Departs Tawi Tawi for Batjan with the MUSASHI, CruDiv 5's HAGURO and MYOKO, DesRon 2's light cruiser NOSHIRO and destroyers. Cdr Sam Dealey in USS HARDER (SS-257), on station nearby, reports the Kon Force leaving Tawi Tawi.

15 June 1944:
YAMATO group is sighted and reported by the USS SEAHORSE (SS-304) east of Mindanao

17 June 1944:
Refuels from the 1st Supply Force's oilers, then joins the Mobile Fleet. Later, the Mobile Fleet is sighted by USS CAVALLA (SS-244) in the Philippine Sea.

23 October 1944: The Battle of the Palawan Passage:
Two American submarines attack Force A. Cdr (later Captain) David H. McClintock's USS DARTER (SS-227) sinks Kurita's flagship, cruiser ATAGO. Kurita abandons ship and is picked from the water by destroyer KISHINAMI. Ten hours later, he transfers to YAMATO and resumes command of the First Diversion Attack Force. Cdr (later Captain) Bladen D. Claggett's USS DACE (SS-247) sinks cruiser MAYA. DARTER also damages cruiser TAKAO. (not an attack on Yamato, but she was there—tater)

21 November 1944:
The YAMATO group is attacked by USS SEALION II (SS-215). KONGO and destroyer URAKAZE are sunk. (not an attack on Yamato, but she was there—tater)

6 April 1945: THREADFIN radios a detailed sighting report of the Attack Force's presence in the Bungo Suido to COMSUBPAC at Guam. The report is intercepted by YAMATO. Later, USS HACKLEBACK (SS-295) also sights the Attack Force and reports, but neither submarine is able to close the range for an attack.