Like are those wall color piping on the left side. The mini split ACs in japan come with precharged outdoor unit which has valves closed so the installers route

Like are those wall color piping on the left side. The mini split ACs in japan come with precharged outdoor unit which has valves closed so the installers route lines from indoor to outdoor unit (using already packed with insulation lines). The connections are made using flare connectors. After all connected they use vacuum pump to evacuate air from lines and then opened up lines that's basically all in the installation.