|The Imperial Japanese Navy’s I-400 class of submarines were the largest ones built during World War II, larger than most contemporary destroyers. They remained the
largest until the 1960s when nuclear-powered ballistic missile subs surpassed them. They were aircraft carrying subs with a massive hangar/sail capable of storing three
Aichi Seiran M6A1 floatplanes. The plan was to build 18 boats but only three were completed and but saw no action in the war After the Japanese surrender, the subs
were handed over to the American military. The subs were inspected and studied and later sunk to prevent them from being inspected by the Soviets who were
demanding access. Tamiya released a very nice 1:350 scale kit of these massive submarines with a small photo-etch part fret. Several years later, Infini Models released
a multimedia detail set for this model. The detail set is comprised of a photo-etch brass fret, a slew of turned brass parts and thin wooden decks. This set is a mix of
additional and replacement parts for the kit.
The photo-etch fret has railings, vertical ladders, parts for the aircraft handling crane, detail parts for the single and triple Type 96 25mm mounts, detail parts for the
Type 11 14cm deck gun, sections of perforated metal decking and details for the watertight hangar hatch. For the Aichi Seiran M6A1 aircraft, the photo-etch has the
propellers, cockpit framing and handling trolleys. Rounding out the photo-etch parts are various handwheels, antennas, aerials and other small detail parts. The photo-
etch frets have parts numbers etched into them for easier identification and cross-reference to the assembly guide. The brass has excellent relief-etching and appears to
be fine but still sturdy enough to handle.
A sheet with 11 sections of wooden decking is included. The largest section is for the deck running from the massive hangar/sail to the stern. Two sections with cut
outs for the airplane rails are to be fitted forward, with two smaller square strips for the ramps meeting the main deck section. The deck atop the hangar has a section
and the sail has two smaller pieces. Even the large airplane trolley has three small sections of wood decking. The decking is thin and looks good and has self-adhesive