Mapped areas are only the ones I have knowledge about and/or actually visited. Occasionally add interesting POI outside the place I visited.

Mainly Kota Malang and Kabupaten Malang.

Example of area I have fully or partially fixed:

• Taman Buah-Buahan Malang: building and its address number
  osm.org/#map=18/-7.974873/112.614664
• Sumber Kucur spring, Wagir: mapped with GPS and direct observation (unfinished)
  osm.org/#map=19/-7.980003/112.585552
• Yayasan Kolese Santo Yusup Malang and nearby area
  osm.org/#map=18/-7.938490/112.639201

I usually mass delete any building made by HOTOSM on densely populated settlements, and start building mapping from scratch, as it will be easier and faster.

New tag I made (no universal approval):

• building=shophouse
  self-explanation, for ruko building across Indonesia and shophouse common in SEA)
• sharia=* (yes/no)
  For hotels or other accomodation that follows sharia laws, example: male and female pairings without marriage certificate are barred from access. Usually, all sharia accomodation have labels on them.
• bpjs=* (yes/no)
  Indicate a healthcare system that accepts Indonesian BPJS universal health care.
  more info: https://en.wikipedia.org/wiki/BPJS_Kesehatan
  Maybe insurance=bpjs is more appropriate?

These wiki guidance for Indonesia seems not properly updated,
and even contradict with each other…

• osm.wiki/Indonesian_Tagging_Guidelines (the default search result on wiki)
• osm.wiki/Id:Pedoman_Penandaan_Indonesia (the one that linked on OSM ID Instagram)

Tag(s) to add to OSM ID guidance:

• Gua Maria: amenity=place_of_worship + place_of_worship=lourdes_grotto + denomination=* =roman_catholic
• Pangkalan ojek: amenity=taxi + taxi_vehicle=motorcycle
  also usually building=roof
• Klinik kecantikan: shop=beauty + beauty=aesthetic
  
• Menara pemancar komunikasi: man_made=tower + tower:type=communication (+) tower:construction=lattice
  Most of Indonesian communication tower is a lattice construction.
• Fotokopi: shop=copyshop
• Tempat persemayaman: amenity=mortuary
• Tambal ban: shop=tyres + motorcycle:tyres=yes
  Might need info whether the tambal ban provides spare tyres or not. ref: motorcycle:repair=*
• Toko bangunan: shop=hardware
• Layanan penggadaian: shop=pawnbroker
  
• Kompleks pemerintahan: landuse=civic_admin (proposed tag)
  landuse=civic_admin
  osm.wiki/Proposal:Civic_admin
• Turun dari sepeda (motor): motorcycle=dismount
  ref: access=*#access-dismount
• Perumahan:
  landuse=residential + residential=gated + road (most of the time): access=permit
  rationale: most of residential road access permit for outsider are generally accepted without any rigorous permission
• Balai RT/RW: amenity=community_centre
• Polisi tidur: traffic_calming=*
  
• Kost/Indekost
  An accomodation where people can rent a room for extended period.
  Often segregated between gender.
  Student are the most common occupant, but family and other single person also can be permitted.
  Usually rented room are 1-12 months, rarely in a day or weekly basis. It’s not dormitory, it’s not exactly a hostel or guest house. tourism=guest_house + guest_house=student_accomodation or guest_house=indekost + female=* or male=* + sharia=* (if needed)
• Gapura: There’s two definition of gapura in Indonesian:
  1.) Hindu temple
  2.) “gate” but not necessarily a way to lock an area.
  man_made=ceremonial_gate
• Toko jamu: shop=herbalist
• TPQ: education=quran_school

(Possibly) no tag equivalent:

• Gang sempit (non-living street):
  osm.wiki/Proposal:Alleyway A street with speed limit, often times the only transporation possible to traverse are motorcycle or bike. Its width can be less than one meter. Living street tag is not suitable, as it visually misled people to think it as wide street.
• Koperasi: Legal economic cooperative that spread accross Indonesia; depends on use, can be a store seeling things
• Praktik dokter bersama: clinic with each individual docter tag?
• Ruko/shophouse: Commmonly residential/retail/office type building in Southeast Asia.
  Might require to create entirely new building=shophouse tag.
  Seen people use building:use=ruko tag.
• Seminari: according to osm.wiki/Philippines/Data_import_Arivac_Bohol, Phillipines use amenity=place_of_worship + place_of_worship=convent for it.
  Maybe amenity=college instead?
• Jual beli bekas logam, besi, kertas, dsb.
• Gantangan
  A place where people showcase their bird pet. Usually built as a roof.
• Ketua RT/RW
• Rumah Sakit Ibu dan Anak, Rumah Sakit khusus Anak
• Pondok Pesantren: boarding school?

Indonesian church list: https://id.wikipedia.org/wiki/Gereja_di_Indonesia

Needs a way to apply them to OSM.