If you've spent any time at all in Japan and paid even a slight amount of attention you have probably seen signs like this one attached to telephone poles. They're up for a day or two and then disappear.
The purpose of the signs is to direct people to the location where wakes and funerals are being held. These days people more and more make use of the increasing number of halls which specialize in funeral services, but it is still fairly common for people to hold at least the wake at their home. This sign going up along Tokyo's Kanpachi in Nerima indicates the way to where services will be held for a member of the Watanabe family.
S-M-C Takumar 105/2.8