Toner and method for manufacturing toner

A toner comprising:

• a core particle, and
• an amorphous outer shell covering the whole surface of the core particle,
• wherein:
• the core particles comprises a binder resin, a colorant, a releasing agent and a polar resin, and wherein:
• the core particle further comprises a crystalline polyester dispersed therein, and
• the crystalline polyester in the core particle satisfies the following relationship:
• 310 nm≦La≦1000 nm;
• 22 nm≦Lb≦50 nm;
• La/Lb≧10,
• wherein La and Lb respectively represent a length and a width of the crystalline polyester dispersed in the core particle observed in a cross-section of the toner with an transmission electron microscope.