Did Germany in world war 2 every try to bomb scapa flow or any other major British naval Base like Japan in pearl Harbor or the British in Taranto?

There were several air attacks on British naval bases, including Scapa Flow and Portsmouth. None of these were as effective as the raids on Pearl Harbor or Taranto. Unlike those raids, the German raids used land-based aircraft, flying from Germany, occupied Norway or France.

The first German air raid of the war came on the 16th October 1939, when nine aircraft, flying from bases in Germany, attacked the naval base at Rosyth, on the Firth of Forth. The attack took the defenders by surprise, with the attacking aircraft only detected when they were close to dropping their bombs. Confusion on the ground only magnified these problems, meaning that the anti-aircraft defences made only a spotty response. Despite these advantages, the bombers had little effect. They bombed the cruisers Southampton and Edinburgh. The bombs missed Edinburgh, but blast and splinters caused minor damage. Southampton received a direct hit which passed through her deck and out her side, doing minor structural damage. She required three days of repairs. The destroyer Mohawk was also attacked. Again, she only received splinter damage, but this was more serious, requiring two months of repairs. While the attackers were trying to escape, they were intercepted by No. 602 and No. 603 Squadrons RAF, with two of the German aircraft being shot down. The following day, the Germans attacked Scapa Flow in a raid of similar scale. Most of the Home Fleet had been evacuated from Scapa Flow following the sinking of Royal Oak in the harbour by U-47. This meant that the only ship to be attacked was the old battleship Iron Duke. Built before WWI, she had been demilitarised and converted to a training ship during the inter-war period. Attacked by four aircraft, she suffered damage from two-three bombs. All of the bombs missed close alongside, with blast damage doing serious damage to her hull plating. She began to flood heavily, forcing her to be beached to keep her from sinking. She was not fully repaired, but instead kept beached as a depot ship supporting the base's small craft. One German aircraft was shot down by anti-aircraft fire.

Scapa's anti-aircraft defences were strengthened after this raid, but they would prove insufficient when the next raid came. On the 16th March 1940, the Germans attacked Scapa in strength. The newly installed balloon barrage had been grounded by bad weather. The base's new radar failed to detect the attackers until it was too late, meaning that RAF squadrons from the base at Wick could not intercept. Many of the AA guns jammed or couldn't target the fast-moving aircraft. Even those that did successfully engage the Germans were ineffective. The cruiser Norfolk was hit, with a single bomb. This penetrated her hull and exploded inside, doing serious damage. Iron Duke would also take two more near misses. The Fleet Air Arm base at Hatston was also bombed. During this raid, James Ibister became the first civilian killed during an air raid on Britain, when his home was bombed. Following this raid, attacks on Scapa Flow tapered off. No further British ships would be damaged there by German bombers. The increased defences and need to divert aircraft to attacks elsewhere made Scapa an uninviting target.

During the early parts of the Battle of Britain, Royal Navy bases on Britain's south coast were often attacked. On the 4th July 1940, Portland harbour was attacked. The anti-aircraft ship Foylebank was sunk, with heavy casualties to her crew. Jack Mantle would posthumously win the Victoria Cross for his actions during the attack. Portsmouth received a light attack on the 11th. Twenty bombs were dropped, and eighteen civilians killed. Dover was heavily attacked on the 19th and 27th, with the destroyers Griffin and Walpole damaged and Codrington sunk. There were also smaller raids against Plymouth, Falmouth and Weymouth. On the 24th August, a large raid struck Portsmouth. Two hundred aircraft attacked the town, aiming mainly at the dockyards. The destroyer Acheron was heavily damaged, and Bulldog lightly damaged. Significant damage was also done to the urban areas around the docks, with over a hundred civilians killed. A follow-up raid on the 26th was disrupted by fighters and did little damage. Following this, the German bomber offensive turned towards attacks on targets further inland.

The German night-bomber offensive, the 'Blitz', included heavy raids on Britain's ports. Most of these raids targeted ports like Liverpool, which were primarily civilian ports, though did have some naval facilities. Naval bases like Plymouth and Portsmouth, though, were often targeted. Between the 14th November 1940 and 16th May 1941, there were five attacks on Portsmouth and nine on Plymouth. These night raids did comparatively little damage to the naval bases. The most heavily damaged ships were the destroyers Cameron and Witherington, hit during two separate attacks on Portsmouth. The cities around the ports were more heavily struck. Portsmouth's Guildhall and Royal Hospital were destroyed, along with many amenities. Five hundred people were killed and 1,500 more injured. Plymouth also lost its Guildhall, and much of its city centre was devastated. Nine hundred were killed, and 40,000 made homeless. There were more attacks on the towns as the war progressed, with ten raids on Portsmouth after 1941 and four major raids on Plymouth. Again, these did more damage to the cities than to the naval yards.