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When using the long system or -shi systems the service the aircraft is intended for must be at the front or confusion could reign as there are more than a few similar designations only differentiated by the service.
Not:- Experimental 10-shi Observation Plane
But :- Navy Experimental 10-shi Observation Plane
as opposed to the (fictional): Army Experimental 10-shi Observation Plane Petebutt (talk) 06:51, 7 June 2010 (UTC)
The -Shi designation system for prototypes was ONLY used by the IJN (according to Mikesh and Abe), not the Imperial Japanese Army so the addition of "Navy" is unnecessary in this case.Nigel Ish (talk) 16:50, 7 June 2010 (UTC)