Bearing device and turbocharger including the same

A bearing device, comprising:

• a rotary part which is configured to be rotatable about a rotational axis and has a rotary surface intersecting the rotational axis;
• and
• a stationary part which has a stationary surface facing the rotary surface,
• wherein one of the rotary surface or the stationary surface includes a bearing surface part for forming a bearing oil film, and
• wherein the rotary surface includes:
• a first inner circumferential region;
• and
• a first outer circumferential region facing the stationary surface on a radially outer side of the bearing surface part and having higher oleophobicity than the first inner circumferential region, and
• wherein the stationary surface includes:
• a second inner circumferential region;
• and
• a second outer circumferential region facing the rotary surface on a radially outer side of the baring surface part and having higher lipophilicity than the second inner circumferential region, and
• wherein the first outer circumferential region and the second outer circumferential region face each other.