AKARI mid-IR all-sky diffuse maps in the ecliptic coordinates after subtraction of the zodiacal emission with the Kondo et al. (2016) model: a) at 9 μm on the trailing side; b) at 9 μm on the leading side; c) at 18 μm on the trailing side; and d) at 18 μm on the leading side. The colour scales are the same in all four panels. The solid box in panel a) indicates the position of the extended bright residual component. This area is 18° × 50° with the centre at (λ,β) = (45°, − 36°).