Captain Ramius: Your conclusions were all wrong, Ryan…Halsey acted stupidly.

Credit to @cats [https://www.simpleplanes.com/u/cats] for the turret of 10cm type 98 AA
There is a fictional design from my novel, and a lot of new plans and devices assemblied. The namesake is the famous mountains of Nikko in Tochigi Prefecture, as the final rest place of shogun Tokugawa Ieyasu and where World Heritage Site of Temples Of Nikko locates.

In the novel which I’m still writing, Nikko was an aviation heavy cruiser of the Navy of Mizuho Empire (Ashihara Nakatsu Teikoku Kaigun) . She was mainly designed by assistant engineer of Naval Technical Department (Kaigun Kansei-cho) Matsudaira Hironobu. Her construction was begun around early 1942, launched at June 1943 and finished at July 1944. She performed well in the battle of cape Engaño and later battle of cape Catanduanes under command of captain Katakura Harumi and lieutenant commander Uekawa Ayuki, which she got her first, second and third kill against TF38.2 and even heavily damaged their flagship New Jersey. Then she join the battle of Kita-go, ran the blockades and transported emergency supplies to homeland, which put Halsey to shame again. She was later stationed at harbor of Kure because of the shortage of fuel, and was concentrated and sunk by Halsey’s forces during July 1945’s air raid on Kure while her officers were summoned to audience by the emperor. Thanks for its well protected design, most of men onboard survived.

20cm/55 3 year type No.3 naval gun with semi-auto loading system fitted in new triple turrets, and 2 set of contra-rotating propellers. In the novel's characteristics it have a maximum installed power of 180,000hp and could reach 40kt, main artillery have a max fire rate of 7-9 round per minute for a single barrel.

Here is the characteristics of Nikko in the story:
Length/width/draught: 223m/22.2m/7.7m
Displacement standard/full load: 16,200tons/19,500tons
Installed power: 180,000hp
Maximum speed: 40.5kt
Cruise speed: 18kt
Range: 7500 n-miles
Armament: 3x3 semi-auto-loading 20.3cm/55 3rd year type No.3 naval guns,
9x2 10cm/65 type 98 Anti-aircraft cannons, 3 sets in turrets and 6 sets in shield carriages
22x3 2.5cm type 96 Anti-aircraft machine guns, most of them fitted with shields, and some of them were later replaced with 28 rounds 12cm rocket launchers(the 'Funshinhou')
4x4 61cm type 93 torpedo launchers, only aft 2 sets have ammo storage of 8 torpedoes each under flight deck. The fore launchers have no storage because of the armor scheme.
Armor: Side 140mm+32mm 16°/Top 85mm 90°/
Conning Tower 160mm 0°/Flight deck 38mm 90°/
Main Turret Shield 200mm/Barbette 200mm/top 80mm
Secondary Turret Shield 51mm/Barbette 51mm
Machine Gun Shield 13mm
Fuel Storage: 2,800tons
Complements about 900-1,000
Radars and Sensors: Type 22-go Air Search Radar x1(on the top of main mast)
Type 42-go Anti-air fire control radar x2(on the top of rangefinders)
Type 13-go Early warning radar x4(on the side of angled mast and conning tower)
Type 22-go Surface search radar x3(in front of conning tower and side of aft bridge)
Aviation facilities: 2 Catapults, 12-14 float planes(max to 18)

8 - switch on/off targeting system and ship roll control, also trigger the blinkers. the targeting system itself triggered by landing gear while group 8 was activated.
1 - 20cm/55 3rd year type No.3 Naval Guns (Main Batteries), controlled by targeting system, fire by key to fire weapon

2 - 10cm/65 type 98 AA/AG Naval Guns (Secondary Batteries), controlled by targeting system, fire by key to fire guns
3 - 12cm Rocket Launcher, controlled by targeting system, fire by key to fire weapon

4 - portside torpedoes, controlled by targeting system, fire by key to fire weapon
5 - starboard torpedoes, controlled by targeting system, fire by key to fire weapon

6 - launch portside observation aircraft, VTOL to adjust throttle and brake while pitch/roll to pitch and roll, trim to deploy flap and side float
7 - launch starboard observation aircraft, same input control to portside aircraft
Landing Gear - low/rise aircraft hangar elevator, and if group 8 was activated it will also trigger the fire control system

Anti-air machine guns (25mm Type 96 Anti-Aircraft Gun) were always fireable and also controlled by targeting system.
WARNING : ROCKET LAUNCHER MAY CAUSE MAJOR EXPLODE IF FIRES AT WRONG DIRECTION

Turret Mod required, if needed i will release a pure version. it may takes time.
Initially set to direct-fire mode. Change to indirect-fire mode (use observe aircraft to set target) by setting the target laser, it located on the fore rangefinder.

Change it to mouse pointing if in-direct fire mode was needed.

3 decoration backup aircraft added which 2 of them in the hangar in front of elevator. Overparts so i give up to add more backup aircrafts, although in the original design there could be up to 7 backup ready-to-use and another 4 as spare parts.
at least the current status works well on my device, even could described as "fluent" as more than 40fps.

VIVAT IMPERATOR!